you know, fritz, code tags are there for a reason. Anyway, I added the following to the light constants up top: <font class="small">Code:</font><hr /><pre> half4 LightPosition4 : POSITION < string Object = "PointLight"; string UIName = "Light 4"; string Space = "World"; int refID = 3; > = {1403.0f, 1441.0f, 1690.0f, 0.0f};…