Redo of render paths

res/shaders/lib/FlatColorMaterial.slang

@@ -0,0 +1,27 @@
+import LightEnv;
+import Material;
+import BRDF;
+import InputGeometry;
+
+struct FlatColorMaterial : IMaterial
+{
+	float3 diffuseColor;
+	float specularity;
+
+    typedef BlinnPhong BRDF;
+    BlinnPhong prepare(MaterialPixelParameter input)
+	{
+        BlinnPhong result;
+		result.baseColor = diffuseColor;
+		result.specular = specularity;
+        result.normal = normalize(input.normal);
+        result.roughness = 0.5;
+		result.specularTint = 0;
+		result.anisotropic = 1;
+		result.sheen = 1;
+		result.sheenTint = 0.5;
+		result.clearCoat = 0;
+		result.clearCoatGloss = 0;
+		return result;
+	}
+};