Channel BOL Question

[macool]

I am a bit lost...

If you have a CG file that has matte info in the RED, GREEN and BLUE channels to be use as sepearte mattes elsewhere..... What would be the method of using the BOL tool to just have the blue in ALPHA but nothing in the red, green or blue areas.

I totally understand the theory of adding the "blue Channel" to alpha, however I really just want the alpha from one of the color channels and NOTHING left in the red, green and blue channels AT ALL!!! Blank no color. I just can't get this to work!!! Is this adding/copying black to each channel?? What am Idoing wrong?!!

IF possible could you mention the specific Operation in the BOL tool.(if that s even the method)

Thanks a million!

[loops]

Operation: Copy
To Red: Black
To Green: Black
To Blue: Black
To Alpha: Blue FG

Make sense? :)

[macool]

That makes perfect sense. Its just what I thought...I guess I needed a bit of coaching. This forum Rocks! The info. is extemely detailed and very helpful.

To all the mentors who take time out of their day to field questions:

You guys inspire me so much. Just when something isn't going right....you help me to hold on and try again. I have learned so much from you all.

I was somewhat self-taught in compositing and have come here for guidance many times. You always come through, no questions asked or comments like, "dude could you have asked a more stupid question?" Not once!

Kudos, cheers and thanks again!