修改为单独调整shader

unity/Assets/Light/shaders/SpriteWithGroundClip.shader

@@ -18,6 +18,11 @@ Shader "Custom/SpriteWithGroundClip"
         
         // 颜色
         _Color ("颜色", Color) = (1, 1, 1, 1)
+        
+        // 光照设置
+        _LightIntensity ("光照强度", Range(0, 2)) = 1.0
+        _AmbientColor ("环境光颜色", Color) = (0.3, 0.3, 0.3, 1.0)
+        [MaterialToggle] _ReceiveLighting ("接受光照", Float) = 1.0
     }
     SubShader
     {
@@ -68,6 +73,9 @@ Shader "Custom/SpriteWithGroundClip"
                 float _GroundHeight;
                 float _EnableClip;
                 float _ClipSoftness;
+                float _LightIntensity;
+                float4 _AmbientColor;
+                float _ReceiveLighting;
             CBUFFER_END
 
             TEXTURE2D(_MainTex);
@@ -94,9 +102,19 @@ Shader "Custom/SpriteWithGroundClip"
                 half4 texColor = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, input.uv);
                 half4 color = texColor * input.color * _Color;
 
-                // 直接接受 Directional Light 的颜色和强度（color 已包含 intensity）
-                Light mainLight = GetMainLight();
-                color.rgb *= mainLight.color;
+                // 光照计算
+                if (_ReceiveLighting > 0.5)
+                {
+                    // 获取主光源（颜色已包含强度）
+                    Light mainLight = GetMainLight();
+                    half3 lightColor = mainLight.color;
+
+                    // Sprite无网格法线，直接用光源颜色作为受光亮度
+                    // 环境光提供基础亮度，漫反射光叠加方向光颜色
+                    half3 ambient = _AmbientColor.rgb;
+                    half3 diffuse = lightColor * _LightIntensity;
+                    color.rgb *= (ambient + diffuse);
+                }
 
                 // 地面裁剪逻辑
                 if (_EnableClip > 0.5)
@@ -168,6 +186,9 @@ Shader "Custom/SpriteWithGroundClip"
                 float _ShadowOpacity;
                 float _ShadowOffset;
                 float4 _ShadowColor;
+                float _LightIntensity;
+                float4 _AmbientColor;
+                float _ReceiveLighting;
             CBUFFER_END
 
             TEXTURE2D(_MainTex);