Object transparent when I use nodes, need help.

On this .blend here i have a cube and a plane and when i try to use nodes the cube is a little transparent. I’m probably not doing something right, so if anyone can tell me how to fix this that would be awesome! Thanks.

the .blend here:


NodesHelp.blend (422 KB)

that’s because you are using the Screen mix mode. That’s what Screen does; see the wiki page that I wrote on mix modes for the Mix node. If you want the cube to be layered over the plane, use the AlphaOver node instead.