PDA

View Full Version : Glow behind Alpha


MisterLee
11-16-2005, 03:47 PM
When I have a plane with an alpha, the glow behind it unveils my whole plane. Does somebody know a workaround for this? See picture. The following link, for some reason is NOT working on my computer, please copypaste instead of clicking: http://www.dwerf.com/cgtalk/glow_en_alpha.jpg

http://www.dwerf.com/cgtalk/glow_en_alpha.jpg
http://www.dwerf.com/cgtalk/glow_en_alpha.jpg

lllab
11-16-2005, 04:32 PM
glow behind alpha is not supported yet in ar.

i hope it will be added in future, but right now it does not work in c4d.

cheers
stefan

Hettinger
11-16-2005, 04:35 PM
The workaround is to render your objects separately then comp them in AE or something.

MisterLee
11-16-2005, 04:39 PM
That's one hell of a workaround! Thanks anyways ;) ...

vid2k2
11-16-2005, 04:41 PM
dwerf,

Aside from compositing 2 renders in photoshop,
you can also subdivide the alpha plane and knock out
the areas you don't need by deleting points and polys.

wuensch
11-16-2005, 05:14 PM
not sure what you are stenciling with the alpha but it might be worth a try to use the alpha in the transparency channel ---

Olli

MisterLee
11-16-2005, 08:31 PM
Why is there exactly an alpha AND a transparency channel? Isn't alpha all about transparency? What is the difference?

JamesMK
11-16-2005, 08:47 PM
Well, alpha is only a matter of simple opacity, whereas transparency involves actual refraction and/or colour tinting etcetera. So they are certainly quite different things.




.

CGTalk Moderation
11-16-2005, 08:47 PM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.