CGTalk - What are Alpha channels?

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CGartist101

07-15-2005, 01:39 AM

Ok im confused with what a alpha channel is. I konw RGB is red, green, and blue combined to make a color right. Now I went into the render and turned on alpha channel and only white to black colors showed up. So im realy confused. Also what is a z channel(depth) and how is that used. Im a big newbie at CG so if I said something stupid please be cool with me. THANKS

de_tomato

07-15-2005, 01:56 AM

Basically it controlled the transperancy of an image. You can find more explaination here:

http://www.bertmonroy.com/tutorials/text/17_alpha.htm

http://www.mediamacros.com/howto/arch/0035.shtml

CGartist101

07-15-2005, 02:03 AM

thanks I got a better sense of a alpha channel

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