Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: equilibrium on 2013-03-11, 16:35:59

Title: Alpha channel bug
Post by: equilibrium on 2013-03-11, 16:35:59

When render glass, in the alpha channel is displayed incorrectly in the refraction of the glass

sorry for my english)

Title: Re: Alpha channel bug
Post by: Polymax on 2013-03-11, 17:32:41

And how should it be? What is wrong?

Title: Re: Alpha channel bug
Post by: maru on 2013-03-11, 17:40:36

If my cheap laptop lcd isn't lying, there's a slight grey gradient on the side windows. It might be a bug. Or maybe your windows aren't 100% transparent?

Title: Re: Alpha channel bug
Post by: shadowman on 2013-03-11, 17:52:48

Quote from: Polymax on 2013-03-11, 17:32:41

And how should it be? What is wrong?

If I'm right equilibrium is about those refractive objects that shouldn't be solid white on alpha channel..?

Title: Re: Alpha channel bug
Post by: Polymax on 2013-03-11, 18:13:42

Strangely, in the last build, alpha of refraction at all gray.
I think the mode "Alpha Channel -> Always Solid" does not work.

Title: Re: Alpha channel bug
Post by: equilibrium on 2013-03-11, 18:30:31

maybe i wrong, but i think refractive area must be white color
P.S. render PT+PT, illumination - standart (corona sun +corona sky), corona alpha 3(not daily build)

Title: Re: Alpha channel bug
Post by: Polymax on 2013-03-11, 18:36:10

It depends on the parameter, but it's not work

Title: Re: Alpha channel bug
Post by: equilibrium on 2013-03-11, 18:51:49

Polymax - you're right. Thanks

Title: Re: Alpha channel bug
Post by: Ondra on 2013-03-12, 01:19:13

I've fixed some bugs with alpha, nevertheless:
- glass materials' alpha is not pure black, because those have also reflection
- when environment is visible through glass, the alpha should come out black, as it is on the columns in your example. Unless you change alpha mode to solid.