Tweak grass blade color

shaders/voxelTopingPS.hlsl

@@ -52,18 +52,23 @@ float4 main(PSInput input) : SV_TARGET0 {
         float halfLambert = rawNdotL * 0.5 + 0.5;
         float wrap = halfLambert * halfLambert; // squared for falloff shape
 
+        // Diffuse floor: even fully back-facing blades get some sun contribution
+        // Simulates light scattering through dense grass (cheap GI approximation)
+        wrap = max(wrap, 0.35);
+
         // Translucency: thin blades let light through from behind
         // Stronger effect to reduce contrast when orbiting around grass
         float3 V = normalize(cameraPosition.xyz - input.worldPos);
         float backLight = saturate(dot(V, L));
-        float transAmount = (1.0 - saturate(rawNdotL)) * 0.8;
+        float transAmount = (1.0 - saturate(rawNdotL)) * 0.6;
         float translucency = backLight * transAmount;
 
-        // Same ambient as voxel faces for color consistency
+        // Higher ambient for vegetation: grass blades bounce light between each other
-        float3 ambient = float3(0.15, 0.18, 0.25);
+        // (simplified inter-reflection / GI), brighter than stone ambient
+        float3 ambient = float3(0.30, 0.33, 0.35);
 
-        // Wrap + strong translucency to minimize light/dark contrast
+        // Wrap + translucency for soft, low-contrast vegetation shading
-        float3 diffuse = sunColor.rgb * (wrap * 0.85 + translucency * 0.6);
+        float3 diffuse = sunColor.rgb * (wrap * 0.88 + translucency * 0.55);
         lit = texColor * (diffuse + ambient);
     }