ahh, that would work if its just a background. I was working with 3d games so the object was not going in as a rendering, but as an object. So the trans colour was on the object's texture map, which would be rendered invisible by the gaming engine. Its nice that Carrara will export procedurals as a texture map though, but I usually did that work using uvmapper and photoshop instead. (better results) If its a rendered background instead then yeah... scratch what I said, rendering with the alpha channel would work :)I'm not sure what dampeoples is trying to do here, though. Is the flag simply rendered in Carrara or are you importing it and its texture as an object?