Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Feature Requests => [Max] Resolved Feature Requests => Topic started by: pokoy on 2016-11-23, 18:07:11

Title: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: pokoy on 2016-11-23, 18:07:11
It looks like using a CoronaVolumeMtl will also affect alpha channel, there's no way to disable it and it can get problematic when used and global volume material... Could we get a checkbox to disable alpha contribution in this material?

EDIT: Also, using a CoronaMtl as global volume material will also affect alpha in exactly the same way, even when alpha mode is set to black. Not sure if to post this as a bug since this should not happen...?
Title: Re: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: pokoy on 2016-11-24, 14:53:31
Or maybe we could have a checkbox to 'ignore volumetric materials' in the alpha element...? That would be the most elegant solution I guess.
Title: Re: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: Ondra on 2017-03-12, 21:04:54
I tried to play with this and I am always getting zero contribution of volumetrics in alpha channel... can you share a simple scene demonstrating the problem?
Title: Re: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: pokoy on 2017-03-13, 11:53:41
Will have to dig out the specific scene, could take a while unfortunately. I can't recall the situation that led to the request so will have to test, sorry...
Title: Re: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: Ondra on 2017-03-14, 10:24:37
ok, I will close this down as part of the spring cleaning, feel free to reopen if you find a problem again
Title: Re: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: pokoy on 2017-03-14, 15:22:08
Just found the project. Will send an image via Skype for you to look at.
Title: Re: Ability to disable alpha contribution for CoronaVolumeMtl
Post by: Ondra on 2017-03-14, 16:39:31
ok, please send simplified  scene here once you have some time ;)