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Re: Problem with volume fog and opacity textures

Posted: Thu Jul 30, 2015 1:58 am
by Rikk The Gaijin
mist wrote:Try the alpha card one. I meant to say greyscale color texture, not float sorry
It works! Thank you mist! 8-)
The only problem is that my original material on the alpha card was a glossy material, and glossy doesn't have a Transmission slot, so I had to convert it to Diffuse, and I've lost the specularity...

Re: Problem with volume fog and opacity textures

Posted: Fri Jul 31, 2015 2:31 am
by haze
Glad to hear that works (except for the glossyness...) - just to help us get to the bottom of the issue, would you mind going back to the glossy material without transmission and flipping the normal of your alpha cards (either by a placement node rotation or using your modelling app), and see if that helps?

Re: Problem with volume fog and opacity textures

Posted: Fri Jul 31, 2015 5:15 am
by Rikk The Gaijin
Flipping the normal does not change anything, I still see the border on the glossy flat card.
To help you debug it, I made a simple scene to show of the problem, grab it from the link below.
https://drive.google.com/file/d/0B42Mj2 ... sp=sharing

Re: Problem with volume fog and opacity textures

Posted: Sat Aug 01, 2015 1:39 am
by stratified
Rikk The Gaijin wrote:Flipping the normal does not change anything, I still see the border on the glossy flat card.
To help you debug it, I made a simple scene to show of the problem, grab it from the link below.
https://drive.google.com/file/d/0B42Mj2 ... sp=sharing
Thanks for the scene. We think we have figured out the problem but we will verify with your scene on Monday.

The problem is that direct light isn't evaluated anymore once the ray scatters behind the transparent plane (that is why it's slightly darker). Having a diffuse material with transmission works and a specular material works as well. To mimic your glossy material, you could use a mix material with a specular and a diffuse material. I think that should work (haven't verified this).

cheers,
Thomas

Re: Problem with volume fog and opacity textures

Posted: Sun Aug 02, 2015 10:01 pm
by stratified
Hi Rikk,

We fixed it for the next release:
scatter_medium_bug_fixed.png
The plane that has the emitter is still visible but it doesn't have any opacity so I assume that's expected?

cheers,
Thomas

Re: Problem with volume fog and opacity textures

Posted: Mon Aug 03, 2015 12:29 am
by Rikk The Gaijin
Great news! Thank you guys, you are the best! 8-)

P.S. When is the next release scheduled for?