Another newbie Q

How do you get a face to be see through in place of a certain color. I have been using ADD and I assume I need to use ALPHA but it seems to do nothing. What kind of setup do I need.

What you’re talking about is chroma-keying. OpenGL, (and thus Blender,) does not support it directly, you need to make a texture that has an alpha channel. (Must be a 32bit TGA or PNG.)

Search for tutorials on how to make an alpha channel in whichever paint program you’re using.

Much more complex than I thought. Thanks.