rp: move emissive color to material converter

Author: jsm174

Runtime/MaterialConverter.cs

@@ -53,6 +53,7 @@ public class MaterialConverter : IMaterialConverter
 		private static readonly int DiffusionProfileAsset = Shader.PropertyToID("_DiffusionProfileAsset");
 		private static readonly int DiffusionProfileHash = Shader.PropertyToID("_DiffusionProfileHash");
 		private static readonly int MaterialID = Shader.PropertyToID("_MaterialID");
+		private static readonly int EmissiveColor = Shader.PropertyToID("_EmissiveColor");
 
 		#endregion
 
@@ -211,6 +212,16 @@ public void SetMaterialType(Material material, MaterialType materialType)
 			material.SetFloat(MaterialID, (int)materialType);
 		}
 
+		public void SetEmissiveColor(MaterialPropertyBlock propBlock, Color color)
+		{
+			propBlock.SetColor(EmissiveColor, color);
+		}
+
+		public Color? GetEmissiveColor(Material material)
+		{
+			return material.GetColor(EmissiveColor);
+		}
+
 		private static Vector4 ConvertGUIDToVector4(string guid)
 		{
 			Vector4 vector;