Redsand1080
10-15-2009, 04:12 AM
Hello all,
I've been working quite a bit with the mia_material_x lately and have run into a snag I haven't seen a thread about. I'm trying to get my alpha channel to show up for the mia_material_x through some transparent and refractive glass. I know that the 'pass custom alpha channel' check box must be checked in order to achieve this. But in this particular case it did not solve the problem.
I'm using the sun and sky set up to light my environment. However, I don't want the sky to show up in the render because I want to composite my scene over a different sky in post. To achieve this I used mip_rayswitch_env and set the environment slot to be the mr_sky shader and the background to be black. This way I got my final gather to pick up on the sky shader but my background premult with black.
When I enabled the pass custom alpha with this set up it turned my alpha channel black. Has anyone else tried this set up or encountered this before? If so any enlightenment would be greatly appreciated. :)
Thanks so much!
I've been working quite a bit with the mia_material_x lately and have run into a snag I haven't seen a thread about. I'm trying to get my alpha channel to show up for the mia_material_x through some transparent and refractive glass. I know that the 'pass custom alpha channel' check box must be checked in order to achieve this. But in this particular case it did not solve the problem.
I'm using the sun and sky set up to light my environment. However, I don't want the sky to show up in the render because I want to composite my scene over a different sky in post. To achieve this I used mip_rayswitch_env and set the environment slot to be the mr_sky shader and the background to be black. This way I got my final gather to pick up on the sky shader but my background premult with black.
When I enabled the pass custom alpha with this set up it turned my alpha channel black. Has anyone else tried this set up or encountered this before? If so any enlightenment would be greatly appreciated. :)
Thanks so much!