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Alpha problem with transparent object.s

Posted: Fri Oct 12, 2007 2:54 am
by Nemesis CGI
Looks like there is a problem with the alpha channel.
If you have a transparent object in the foreground, it still render the alpha as if there's no objects behind.

I'll upload a sample later...


Shaun.

Posted: Fri Oct 12, 2007 11:21 am
by walfridson
It's known, hopefully it will be fixed soon
One other thing, object set to unseen by camera placed inside a transparent object is visible.

Posted: Fri Oct 12, 2007 2:46 pm
by Nemesis CGI
walfridson wrote:It's known, hopefully it will be fixed soon
One other thing, object set to unseen by camera placed inside a transparent object is visible.
Cool, thanks for the heads up.

Shaun.

Posted: Fri Oct 19, 2007 2:51 pm
by phile_forum
Actually, I'd been using the alpha "bug" to my advantage it to mask out the background without affecting foreground transparent objects. Now I'm using OB4 I can't do that any more...

Any chance we can have an option for foreground transparency to be ignored on the alpha channel, just as it was in the "buggy" OB3?

Phil

alpha channel

Posted: Thu Dec 06, 2007 11:49 am
by mx
HI there I am new to kray. I usually render views out of an interior window on an alpha channel as a 32-bit png and then add the backdrop in behind the glass in photoshop. Can I still do this with kray? If so how?

Re: alpha channel

Posted: Thu Dec 06, 2007 11:59 am
by acidarrow
mx wrote:HI there I am new to kray. I usually render views out of an interior window on an alpha channel as a 32-bit png and then add the backdrop in behind the glass in photoshop. Can I still do this with kray? If so how?
You can have it make you a separate file with the alpha and then comp-it later. So, yes.

Posted: Fri Dec 07, 2007 8:00 pm
by mx
good to know, so could you tell me how?

Posted: Fri Dec 07, 2007 10:45 pm
by acidarrow
Add needbuffers -1; to header commands and it will try save all available buffers. The resulting buffers are kind of buggy though, that's why it's undocumented and not included in the GUI yet.

And I think needbuffers 3; exports only the alpha.