[Add] Synaptic AI Pro

https://assetstore.unity.com/packages/tools/generative-ai/synaptic-ai-pro-natural-language-control-for-unity-336030

Assets/Synaptic AI Pro/Shaders/Grass/SynapticGrassPro.shader

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+Shader "Synaptic/GrassPro"
+{
+    Properties
+    {
+        [Header(Base)]
+        _MainTex ("Albedo", 2D) = "white" {}
+        _BaseColor ("Base Color", Color) = (0.2, 0.6, 0.2, 1)
+        _TipColor ("Tip Color", Color) = (0.5, 0.9, 0.3, 1)
+        _GradientPower ("Gradient Power", Range(0.1, 3)) = 1
+
+        [Header(Wind Animation)]
+        [Toggle(_WIND_ON)] _WindEnabled ("Enable Wind", Float) = 1
+        _WindStrength ("Wind Strength", Range(0, 2)) = 0.5
+        _WindSpeed ("Wind Speed", Float) = 1
+        _WindFrequency ("Wind Frequency", Float) = 1
+        _WindDirection ("Wind Direction", Vector) = (1, 0, 0.5, 0)
+        _WindNoiseTex ("Wind Noise", 2D) = "grey" {}
+        _WindNoiseScale ("Wind Noise Scale", Float) = 0.1
+        _WindGustStrength ("Gust Strength", Range(0, 2)) = 0.3
+        _WindGustFrequency ("Gust Frequency", Float) = 0.5
+
+        [Header(Player Interaction)]
+        [Toggle(_INTERACTION_ON)] _InteractionEnabled ("Enable Interaction", Float) = 1
+        _InteractionRadius ("Interaction Radius", Float) = 2
+        _InteractionStrength ("Interaction Strength", Range(0, 2)) = 1
+        _InteractionFalloff ("Interaction Falloff", Range(0.1, 5)) = 2
+
+        [Header(Subsurface Scattering)]
+        [Toggle(_SSS_ON)] _SSSEnabled ("Enable SSS", Float) = 1
+        _SSSColor ("SSS Color", Color) = (0.8, 1.0, 0.5, 1)
+        _SSSStrength ("SSS Strength", Range(0, 2)) = 1
+        _SSSDistortion ("SSS Distortion", Range(0, 1)) = 0.5
+        _SSSPower ("SSS Power", Range(1, 16)) = 4
+
+        [Header(Detail)]
+        _AO ("Ambient Occlusion", Range(0, 1)) = 0.5
+        _AOPower ("AO Power", Range(0.1, 3)) = 1
+        _Roughness ("Roughness", Range(0, 1)) = 0.8
+
+        [Header(Specular)]
+        [Toggle(_SPECULAR_ON)] _SpecularEnabled ("Enable Specular", Float) = 1
+        _SpecularColor ("Specular Color", Color) = (1, 1, 0.8, 1)
+        _SpecularIntensity ("Specular Intensity", Range(0, 3)) = 0.5
+        _SpecularPower ("Specular Power", Range(1, 128)) = 32
+
+        [Header(Distance Fade)]
+        [Toggle(_DISTANCE_FADE_ON)] _DistanceFadeEnabled ("Enable Distance Fade", Float) = 1
+        _FadeStart ("Fade Start", Float) = 30
+        _FadeEnd ("Fade End", Float) = 50
+        _FadeMinScale ("Fade Min Scale", Range(0, 1)) = 0.3
+
+        [Header(Cutout)]
+        _Cutoff ("Alpha Cutoff", Range(0, 1)) = 0.5
+
+        [Header(Rendering)]
+        [Enum(UnityEngine.Rendering.CullMode)] _Cull ("Cull Mode", Float) = 0
+    }
+
+    SubShader
+    {
+        PackageRequirements { "com.unity.render-pipelines.universal" }
+        Tags
+        {
+            "RenderType" = "TransparentCutout"
+            "Queue" = "AlphaTest"
+            "RenderPipeline" = "UniversalPipeline"
+        }
+
+        Pass
+        {
+            Name "GrassForward"
+            Tags { "LightMode" = "UniversalForward" }
+
+            Cull [_Cull]
+            AlphaToMask On
+
+            HLSLPROGRAM
+            #pragma target 4.5
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE
+            #pragma multi_compile_fragment _ _SHADOWS_SOFT
+            #pragma multi_compile _ _ADDITIONAL_LIGHTS
+            #pragma multi_compile_fog
+            #pragma multi_compile_instancing
+
+            #pragma shader_feature_local _WIND_ON
+            #pragma shader_feature_local _INTERACTION_ON
+            #pragma shader_feature_local _SSS_ON
+            #pragma shader_feature_local _SPECULAR_ON
+            #pragma shader_feature_local _DISTANCE_FADE_ON
+
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
+
+            TEXTURE2D(_MainTex);
+            TEXTURE2D(_WindNoiseTex);
+            SAMPLER(sampler_MainTex);
+            SAMPLER(sampler_WindNoiseTex);
+
+            // Interaction positions (set from script)
+            float4 _InteractionPositions[16];
+            int _InteractionCount;
+
+            CBUFFER_START(UnityPerMaterial)
+                float4 _MainTex_ST;
+                float4 _BaseColor;
+                float4 _TipColor;
+                float _GradientPower;
+
+                float _WindStrength;
+                float _WindSpeed;
+                float _WindFrequency;
+                float4 _WindDirection;
+                float4 _WindNoiseTex_ST;
+                float _WindNoiseScale;
+                float _WindGustStrength;
+                float _WindGustFrequency;
+
+                float _InteractionRadius;
+                float _InteractionStrength;
+                float _InteractionFalloff;
+
+                float4 _SSSColor;
+                float _SSSStrength;
+                float _SSSDistortion;
+                float _SSSPower;
+
+                float _AO;
+                float _AOPower;
+                float _Roughness;
+
+                float4 _SpecularColor;
+                float _SpecularIntensity;
+                float _SpecularPower;
+
+                float _FadeStart;
+                float _FadeEnd;
+                float _FadeMinScale;
+
+                float _Cutoff;
+            CBUFFER_END
+
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float3 normalOS : NORMAL;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR; // R = height, G = AO, B = unused, A = stiffness
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                float3 worldPos : TEXCOORD1;
+                float3 worldNormal : TEXCOORD2;
+                float4 vertexColor : TEXCOORD3;
+                float4 shadowCoord : TEXCOORD4;
+                float fogFactor : TEXCOORD5;
+                float heightGradient : TEXCOORD6;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            // Wind functions
+            float3 WindAnimation(float3 worldPos, float height, float stiffness, float time)
+            {
+                #if defined(_WIND_ON)
+                    float3 windDir = normalize(_WindDirection.xyz);
+
+                    // Sample wind noise
+                    float2 noiseUV = worldPos.xz * _WindNoiseScale + time * _WindSpeed * 0.1;
+                    float noise = SAMPLE_TEXTURE2D_LOD(_WindNoiseTex, sampler_WindNoiseTex, noiseUV, 0).r;
+
+                    // Main wind wave
+                    float windPhase = dot(worldPos.xz, windDir.xz) * _WindFrequency + time * _WindSpeed;
+                    float wave = sin(windPhase) * 0.5 + 0.5;
+
+                    // Gust
+                    float gustPhase = time * _WindGustFrequency;
+                    float gust = sin(gustPhase) * sin(gustPhase * 2.3) * _WindGustStrength;
+
+                    // Combined wind
+                    float windFactor = (wave + gust + noise - 0.5) * _WindStrength;
+                    windFactor *= height * height; // Quadratic falloff from root
+                    windFactor *= (1 - stiffness); // Stiffness reduces wind effect
+
+                    return windDir * windFactor;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            // Player interaction
+            float3 InteractionDisplacement(float3 worldPos, float height)
+            {
+                #if defined(_INTERACTION_ON)
+                    float3 totalDisplacement = float3(0, 0, 0);
+
+                    for (int i = 0; i < _InteractionCount && i < 16; i++)
+                    {
+                        float3 interactorPos = _InteractionPositions[i].xyz;
+                        float3 toGrass = worldPos - interactorPos;
+                        toGrass.y = 0;
+
+                        float dist = length(toGrass);
+                        float influence = 1 - saturate(pow(dist / _InteractionRadius, _InteractionFalloff));
+
+                        if (influence > 0.001)
+                        {
+                            float3 pushDir = normalize(toGrass + float3(0.001, 0, 0.001));
+                            totalDisplacement += pushDir * influence * _InteractionStrength * height;
+                        }
+                    }
+
+                    return totalDisplacement;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            Varyings vert(Attributes IN)
+            {
+                Varyings OUT;
+                UNITY_SETUP_INSTANCE_ID(IN);
+                UNITY_TRANSFER_INSTANCE_ID(IN, OUT);
+
+                float height = IN.color.r; // Height along blade (0 = root, 1 = tip)
+                float stiffness = IN.color.a;
+                float time = _Time.y;
+
+                float3 posOS = IN.positionOS.xyz;
+                float3 worldPosBase = TransformObjectToWorld(float3(0, 0, 0));
+
+                // Distance fade
+                #if defined(_DISTANCE_FADE_ON)
+                    float distToCam = distance(worldPosBase, _WorldSpaceCameraPos);
+                    float fadeFactor = saturate((distToCam - _FadeStart) / (_FadeEnd - _FadeStart));
+                    float scale = lerp(1, _FadeMinScale, fadeFactor);
+                    posOS *= scale;
+                #endif
+
+                float3 worldPos = TransformObjectToWorld(posOS);
+
+                // Apply wind
+                float3 windOffset = WindAnimation(worldPos, height, stiffness, time);
+                worldPos += windOffset;
+
+                // Apply interaction
+                float3 interactOffset = InteractionDisplacement(worldPos, height);
+                worldPos += interactOffset;
+
+                OUT.worldPos = worldPos;
+                OUT.positionCS = TransformWorldToHClip(worldPos);
+                OUT.uv = TRANSFORM_TEX(IN.uv, _MainTex);
+                OUT.worldNormal = TransformObjectToWorldNormal(IN.normalOS);
+                OUT.vertexColor = IN.color;
+                OUT.shadowCoord = TransformWorldToShadowCoord(worldPos);
+                OUT.fogFactor = ComputeFogFactor(OUT.positionCS.z);
+                OUT.heightGradient = height;
+
+                return OUT;
+            }
+
+            // SSS function
+            float3 SubsurfaceScattering(float3 viewDir, float3 lightDir, float3 normal, float3 lightColor)
+            {
+                #if defined(_SSS_ON)
+                    float3 H = normalize(lightDir + normal * _SSSDistortion);
+                    float VdotH = pow(saturate(dot(viewDir, -H)), _SSSPower);
+                    return _SSSColor.rgb * VdotH * _SSSStrength * lightColor;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            float4 frag(Varyings IN) : SV_Target
+            {
+                UNITY_SETUP_INSTANCE_ID(IN);
+
+                // Sample texture
+                float4 texColor = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uv);
+                clip(texColor.a - _Cutoff);
+
+                float3 viewDir = normalize(_WorldSpaceCameraPos - IN.worldPos);
+                float3 normal = normalize(IN.worldNormal);
+
+                // Height-based color gradient
+                float gradientFactor = pow(IN.heightGradient, _GradientPower);
+                float3 albedo = lerp(_BaseColor.rgb, _TipColor.rgb, gradientFactor) * texColor.rgb;
+
+                // Ambient occlusion from vertex color
+                float ao = lerp(1, IN.vertexColor.g, _AO);
+                ao = pow(ao, _AOPower);
+
+                // Lighting
+                Light mainLight = GetMainLight(IN.shadowCoord);
+                float3 lightDir = mainLight.direction;
+                float3 lightColor = mainLight.color;
+                float shadow = mainLight.shadowAttenuation;
+
+                // Wrapped diffuse for softer look
+                float NdotL = dot(normal, lightDir);
+                float wrappedNdotL = NdotL * 0.5 + 0.5;
+                float3 diffuse = albedo * lightColor * wrappedNdotL * shadow;
+
+                // SSS
+                float3 sss = SubsurfaceScattering(viewDir, lightDir, normal, lightColor);
+                sss *= (1 - IN.heightGradient) * shadow; // More SSS at base
+
+                // Specular
+                float3 specular = float3(0, 0, 0);
+                #if defined(_SPECULAR_ON)
+                    float3 halfDir = normalize(lightDir + viewDir);
+                    float NdotH = saturate(dot(normal, halfDir));
+                    float spec = pow(NdotH, _SpecularPower) * _SpecularIntensity;
+                    specular = _SpecularColor.rgb * spec * shadow * IN.heightGradient; // More specular at tip
+                #endif
+
+                // Additional lights
+                float3 additionalLights = float3(0, 0, 0);
+                #if defined(_ADDITIONAL_LIGHTS)
+                    uint pixelLightCount = GetAdditionalLightsCount();
+                    for (uint i = 0; i < pixelLightCount; i++)
+                    {
+                        Light light = GetAdditionalLight(i, IN.worldPos);
+                        float addNdotL = saturate(dot(normal, light.direction));
+                        additionalLights += albedo * light.color * light.distanceAttenuation * addNdotL * 0.5;
+                    }
+                #endif
+
+                // Ambient
+                float3 ambient = albedo * 0.1;
+
+                // Combine
+                float3 finalColor = (diffuse + sss + specular + additionalLights + ambient) * ao;
+
+                // Fog
+                finalColor = MixFog(finalColor, IN.fogFactor);
+
+                return float4(finalColor, texColor.a);
+            }
+            ENDHLSL
+        }
+
+        // Shadow caster pass
+        Pass
+        {
+            Name "ShadowCaster"
+            Tags { "LightMode" = "ShadowCaster" }
+
+            ZWrite On
+            ZTest LEqual
+            ColorMask 0
+            Cull Off
+
+            HLSLPROGRAM
+            #pragma target 4.5
+            #pragma vertex ShadowVert
+            #pragma fragment ShadowFrag
+
+            #pragma multi_compile_instancing
+            #pragma shader_feature_local _WIND_ON
+            #pragma shader_feature_local _DISTANCE_FADE_ON
+
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+            float3 _LightDirection;
+
+            float3 ApplyShadowBiasCustom(float3 positionWS, float3 normalWS, float3 lightDirection)
+            {
+                float invNdotL = 1.0 - saturate(dot(lightDirection, normalWS));
+                float scale = invNdotL * 0.001;
+                positionWS = lightDirection * 0.001 + positionWS;
+                positionWS = normalWS * scale.xxx + positionWS;
+                return positionWS;
+            }
+
+            TEXTURE2D(_MainTex);
+            TEXTURE2D(_WindNoiseTex);
+            SAMPLER(sampler_MainTex);
+            SAMPLER(sampler_WindNoiseTex);
+
+            CBUFFER_START(UnityPerMaterial)
+                float4 _MainTex_ST;
+                float _WindStrength;
+                float _WindSpeed;
+                float _WindFrequency;
+                float4 _WindDirection;
+                float _WindNoiseScale;
+                float _WindGustStrength;
+                float _WindGustFrequency;
+                float _FadeStart;
+                float _FadeEnd;
+                float _FadeMinScale;
+                float _Cutoff;
+            CBUFFER_END
+
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float3 normalOS : NORMAL;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            float3 WindAnimation(float3 worldPos, float height, float stiffness, float time)
+            {
+                #if defined(_WIND_ON)
+                    float3 windDir = normalize(_WindDirection.xyz);
+                    float windPhase = dot(worldPos.xz, windDir.xz) * _WindFrequency + time * _WindSpeed;
+                    float wave = sin(windPhase) * 0.5 + 0.5;
+                    float gustPhase = time * _WindGustFrequency;
+                    float gust = sin(gustPhase) * sin(gustPhase * 2.3) * _WindGustStrength;
+                    float windFactor = (wave + gust - 0.25) * _WindStrength;
+                    windFactor *= height * height;
+                    windFactor *= (1 - stiffness);
+                    return windDir * windFactor;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            Varyings ShadowVert(Attributes IN)
+            {
+                Varyings OUT;
+                UNITY_SETUP_INSTANCE_ID(IN);
+                UNITY_TRANSFER_INSTANCE_ID(IN, OUT);
+
+                float height = IN.color.r;
+                float stiffness = IN.color.a;
+
+                float3 posOS = IN.positionOS.xyz;
+
+                #if defined(_DISTANCE_FADE_ON)
+                    float3 worldPosBase = TransformObjectToWorld(float3(0, 0, 0));
+                    float distToCam = distance(worldPosBase, _WorldSpaceCameraPos);
+                    float fadeFactor = saturate((distToCam - _FadeStart) / (_FadeEnd - _FadeStart));
+                    float scale = lerp(1, _FadeMinScale, fadeFactor);
+                    posOS *= scale;
+                #endif
+
+                float3 worldPos = TransformObjectToWorld(posOS);
+                worldPos += WindAnimation(worldPos, height, stiffness, _Time.y);
+
+                float3 worldNormal = TransformObjectToWorldNormal(IN.normalOS);
+                worldPos = ApplyShadowBiasCustom(worldPos, worldNormal, _LightDirection);
+                float4 posCS = TransformWorldToHClip(worldPos);
+
+                #if UNITY_REVERSED_Z
+                    posCS.z = min(posCS.z, UNITY_NEAR_CLIP_VALUE);
+                #else
+                    posCS.z = max(posCS.z, UNITY_NEAR_CLIP_VALUE);
+                #endif
+
+                OUT.positionCS = posCS;
+                OUT.uv = TRANSFORM_TEX(IN.uv, _MainTex);
+
+                return OUT;
+            }
+
+            float4 ShadowFrag(Varyings IN) : SV_Target
+            {
+                float alpha = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uv).a;
+                clip(alpha - _Cutoff);
+                return 0;
+            }
+            ENDHLSL
+        }
+
+        // Depth pass
+        Pass
+        {
+            Name "DepthOnly"
+            Tags { "LightMode" = "DepthOnly" }
+
+            ZWrite On
+            ColorMask 0
+            Cull Off
+
+            HLSLPROGRAM
+            #pragma target 4.5
+            #pragma vertex DepthVert
+            #pragma fragment DepthFrag
+
+            #pragma multi_compile_instancing
+            #pragma shader_feature_local _WIND_ON
+            #pragma shader_feature_local _DISTANCE_FADE_ON
+
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+            TEXTURE2D(_MainTex);
+            SAMPLER(sampler_MainTex);
+
+            CBUFFER_START(UnityPerMaterial)
+                float4 _MainTex_ST;
+                float _WindStrength;
+                float _WindSpeed;
+                float _WindFrequency;
+                float4 _WindDirection;
+                float _WindGustStrength;
+                float _WindGustFrequency;
+                float _FadeStart;
+                float _FadeEnd;
+                float _FadeMinScale;
+                float _Cutoff;
+            CBUFFER_END
+
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float2 uv : TEXCOORD0;
+            };
+
+            float3 WindAnimation(float3 worldPos, float height, float stiffness, float time)
+            {
+                #if defined(_WIND_ON)
+                    float3 windDir = normalize(_WindDirection.xyz);
+                    float windPhase = dot(worldPos.xz, windDir.xz) * _WindFrequency + time * _WindSpeed;
+                    float wave = sin(windPhase) * 0.5 + 0.5;
+                    float gustPhase = time * _WindGustFrequency;
+                    float gust = sin(gustPhase) * sin(gustPhase * 2.3) * _WindGustStrength;
+                    float windFactor = (wave + gust - 0.25) * _WindStrength;
+                    windFactor *= height * height;
+                    windFactor *= (1 - stiffness);
+                    return windDir * windFactor;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            Varyings DepthVert(Attributes IN)
+            {
+                Varyings OUT;
+                UNITY_SETUP_INSTANCE_ID(IN);
+
+                float height = IN.color.r;
+                float stiffness = IN.color.a;
+                float3 posOS = IN.positionOS.xyz;
+
+                #if defined(_DISTANCE_FADE_ON)
+                    float3 worldPosBase = TransformObjectToWorld(float3(0, 0, 0));
+                    float distToCam = distance(worldPosBase, _WorldSpaceCameraPos);
+                    float fadeFactor = saturate((distToCam - _FadeStart) / (_FadeEnd - _FadeStart));
+                    posOS *= lerp(1, _FadeMinScale, fadeFactor);
+                #endif
+
+                float3 worldPos = TransformObjectToWorld(posOS);
+                worldPos += WindAnimation(worldPos, height, stiffness, _Time.y);
+
+                OUT.positionCS = TransformWorldToHClip(worldPos);
+                OUT.uv = TRANSFORM_TEX(IN.uv, _MainTex);
+
+                return OUT;
+            }
+
+            float4 DepthFrag(Varyings IN) : SV_Target
+            {
+                float alpha = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uv).a;
+                clip(alpha - _Cutoff);
+                return 0;
+            }
+            ENDHLSL
+        }
+    }
+
+    // ==================== Built-in Pipeline SubShader ====================
+    SubShader
+    {
+        Tags { "RenderType" = "TransparentCutout" "Queue" = "AlphaTest" }
+
+        Pass
+        {
+            Name "GrassBuiltIn"
+            Tags { "LightMode" = "ForwardBase" }
+            Cull Off
+
+            CGPROGRAM
+            #pragma target 3.0
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile_fwdbase
+            #pragma multi_compile_fog
+            #pragma multi_compile_instancing
+
+            #pragma shader_feature_local _WIND_ON
+            #pragma shader_feature_local _SSS_ON
+            #pragma shader_feature_local _SPECULAR_ON
+
+            #include "UnityCG.cginc"
+            #include "Lighting.cginc"
+            #include "AutoLight.cginc"
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            float4 _BaseColor;
+            float4 _TipColor;
+            float _GradientPower;
+            float _WindStrength;
+            float _WindSpeed;
+            float _WindFrequency;
+            float4 _WindDirection;
+            float _WindGustStrength;
+            float _WindGustFrequency;
+            float4 _SSSColor;
+            float _SSSStrength;
+            float _SSSDistortion;
+            float _SSSPower;
+            float4 _SpecularColor;
+            float _SpecularIntensity;
+            float _SpecularPower;
+            float _AO;
+            float _AOPower;
+            float _Cutoff;
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float3 normal : NORMAL;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct v2f
+            {
+                float4 pos : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                float3 worldPos : TEXCOORD1;
+                float3 worldNormal : TEXCOORD2;
+                float4 vertexColor : TEXCOORD3;
+                float heightGradient : TEXCOORD4;
+                SHADOW_COORDS(5)
+                UNITY_FOG_COORDS(6)
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            float3 WindAnimation(float3 worldPos, float height, float stiffness, float time)
+            {
+                #if defined(_WIND_ON)
+                    float3 windDir = normalize(_WindDirection.xyz);
+                    float windPhase = dot(worldPos.xz, windDir.xz) * _WindFrequency + time * _WindSpeed;
+                    float wave = sin(windPhase) * 0.5 + 0.5;
+                    float gustPhase = time * _WindGustFrequency;
+                    float gust = sin(gustPhase) * sin(gustPhase * 2.3) * _WindGustStrength;
+                    float windFactor = (wave + gust - 0.25) * _WindStrength;
+                    windFactor *= height * height * (1 - stiffness);
+                    return windDir * windFactor;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            v2f vert(appdata v)
+            {
+                v2f o;
+                UNITY_SETUP_INSTANCE_ID(v);
+                UNITY_TRANSFER_INSTANCE_ID(v, o);
+
+                float height = v.color.r;
+                float stiffness = v.color.a;
+                float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
+                worldPos += WindAnimation(worldPos, height, stiffness, _Time.y);
+
+                o.pos = mul(UNITY_MATRIX_VP, float4(worldPos, 1));
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+                o.worldPos = worldPos;
+                o.worldNormal = UnityObjectToWorldNormal(v.normal);
+                o.vertexColor = v.color;
+                o.heightGradient = height;
+                TRANSFER_SHADOW(o)
+                UNITY_TRANSFER_FOG(o, o.pos);
+                return o;
+            }
+
+            float4 frag(v2f i) : SV_Target
+            {
+                UNITY_SETUP_INSTANCE_ID(i);
+
+                float4 texColor = tex2D(_MainTex, i.uv);
+                clip(texColor.a - _Cutoff);
+
+                float3 viewDir = normalize(_WorldSpaceCameraPos - i.worldPos);
+                float3 normal = normalize(i.worldNormal);
+
+                float gradientFactor = pow(i.heightGradient, _GradientPower);
+                float3 albedo = lerp(_BaseColor.rgb, _TipColor.rgb, gradientFactor) * texColor.rgb;
+
+                float ao = pow(lerp(1, i.vertexColor.g, _AO), _AOPower);
+
+                float3 lightDir = normalize(_WorldSpaceLightPos0.xyz);
+                float3 lightColor = _LightColor0.rgb;
+                float shadow = SHADOW_ATTENUATION(i);
+
+                float NdotL = saturate(dot(normal, lightDir));
+                float3 diffuse = albedo * lightColor * NdotL * shadow;
+
+                float3 sss = float3(0, 0, 0);
+                #if defined(_SSS_ON)
+                    float3 H = normalize(lightDir + normal * _SSSDistortion);
+                    float VdotH = pow(saturate(dot(viewDir, -H)), _SSSPower);
+                    sss = _SSSColor.rgb * VdotH * _SSSStrength * lightColor * shadow;
+                #endif
+
+                float3 specular = float3(0, 0, 0);
+                #if defined(_SPECULAR_ON)
+                    float3 halfDir = normalize(lightDir + viewDir);
+                    float NdotH = saturate(dot(normal, halfDir));
+                    float spec = pow(NdotH, _SpecularPower);
+                    specular = _SpecularColor.rgb * spec * _SpecularIntensity * lightColor * shadow;
+                #endif
+
+                float3 ambient = albedo * 0.1;
+                float3 finalColor = (diffuse + sss + specular + ambient) * ao;
+                UNITY_APPLY_FOG(i.fogCoord, finalColor);
+
+                return float4(finalColor, texColor.a);
+            }
+            ENDCG
+        }
+    }
+
+    // ==================== HDRP SubShader ====================
+    SubShader
+    {
+        PackageRequirements { "com.unity.render-pipelines.high-definition" }
+        Tags { "RenderType" = "TransparentCutout" "Queue" = "AlphaTest" "RenderPipeline" = "HDRenderPipeline" }
+
+        Pass
+        {
+            Name "GrassHDRP"
+            Tags { "LightMode" = "Forward" }
+            Cull Off
+
+            HLSLPROGRAM
+            #pragma target 4.5
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile_instancing
+            #pragma shader_feature_local _WIND_ON
+            #pragma shader_feature_local _SSS_ON
+
+            #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
+            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
+
+            TEXTURE2D(_MainTex);
+            SAMPLER(sampler_MainTex);
+
+            CBUFFER_START(UnityPerMaterial)
+                float4 _MainTex_ST;
+                float4 _BaseColor;
+                float4 _TipColor;
+                float _GradientPower;
+                float _WindStrength;
+                float _WindSpeed;
+                float _WindFrequency;
+                float4 _WindDirection;
+                float _WindGustStrength;
+                float _WindGustFrequency;
+                float4 _SSSColor;
+                float _SSSStrength;
+                float _SSSDistortion;
+                float _SSSPower;
+                float _AO;
+                float _AOPower;
+                float _Cutoff;
+            CBUFFER_END
+
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float3 normalOS : NORMAL;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                float3 worldPos : TEXCOORD1;
+                float3 worldNormal : TEXCOORD2;
+                float4 vertexColor : TEXCOORD3;
+                float heightGradient : TEXCOORD4;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            float3 WindAnimation(float3 worldPos, float height, float stiffness, float time)
+            {
+                #if defined(_WIND_ON)
+                    float3 windDir = normalize(_WindDirection.xyz);
+                    float windPhase = dot(worldPos.xz, windDir.xz) * _WindFrequency + time * _WindSpeed;
+                    float wave = sin(windPhase) * 0.5 + 0.5;
+                    float gust = sin(time * _WindGustFrequency) * sin(time * _WindGustFrequency * 2.3) * _WindGustStrength;
+                    float windFactor = (wave + gust - 0.25) * _WindStrength * height * height * (1 - stiffness);
+                    return windDir * windFactor;
+                #else
+                    return float3(0, 0, 0);
+                #endif
+            }
+
+            Varyings vert(Attributes IN)
+            {
+                Varyings OUT;
+                UNITY_SETUP_INSTANCE_ID(IN);
+                UNITY_TRANSFER_INSTANCE_ID(IN, OUT);
+
+                float height = IN.color.r;
+                float stiffness = IN.color.a;
+                float3 worldPos = TransformObjectToWorld(IN.positionOS.xyz);
+                worldPos += WindAnimation(worldPos, height, stiffness, _Time.y);
+
+                OUT.positionCS = TransformWorldToHClip(worldPos);
+                OUT.uv = IN.uv * _MainTex_ST.xy + _MainTex_ST.zw;
+                OUT.worldPos = worldPos;
+                OUT.worldNormal = TransformObjectToWorldNormal(IN.normalOS);
+                OUT.vertexColor = IN.color;
+                OUT.heightGradient = height;
+                return OUT;
+            }
+
+            float4 frag(Varyings IN) : SV_Target
+            {
+                UNITY_SETUP_INSTANCE_ID(IN);
+
+                float4 texColor = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uv);
+                clip(texColor.a - _Cutoff);
+
+                float3 viewDir = GetWorldSpaceNormalizeViewDir(IN.worldPos);
+                float3 normal = normalize(IN.worldNormal);
+
+                float gradientFactor = pow(IN.heightGradient, _GradientPower);
+                float3 albedo = lerp(_BaseColor.rgb, _TipColor.rgb, gradientFactor) * texColor.rgb;
+                float ao = pow(lerp(1, IN.vertexColor.g, _AO), _AOPower);
+
+                float3 lightDir = float3(0.5, 0.8, 0.2);
+                float NdotL = saturate(dot(normal, lightDir));
+                float3 diffuse = albedo * NdotL;
+
+                float3 sss = float3(0, 0, 0);
+                #if defined(_SSS_ON)
+                    float3 H = normalize(lightDir + normal * _SSSDistortion);
+                    float VdotH = pow(saturate(dot(viewDir, -H)), _SSSPower);
+                    sss = _SSSColor.rgb * VdotH * _SSSStrength;
+                #endif
+
+                float3 finalColor = (diffuse + sss + albedo * 0.1) * ao;
+                return float4(finalColor, texColor.a);
+            }
+            ENDHLSL
+        }
+    }
+
+    FallBack "Universal Render Pipeline/Unlit"
+}