Forums: How To Render Fog Volume with Alpha Channel
Generic forum to discuss Octane Render, post ideas and suggest improvements.
Forum rules
Please add your OS and Hardware Configuration in your signature, it makes it easier for us to help you analyze problems. Example: Win 7 64 | Geforce GTX680 | i7 3770 | 16GB
Hello everyone! I am trying to render out a scene that has VDB volumes that I would like to keep in the scene. I want to change the background of the Octane Daylight later in Photoshop, so I want to render the scene with the alpha channel on. However, the VDB volumes extend where the background is. When I tried rendering out the scene with alpha channel the VDB volumes flattened and lost all of their depth. Is there a way to export the VDB's on an alpha channel and retain the depth and opacity to them? Thanks for the help!
Hi PixelEyes, Volume/vdbs are not polygon based, so cannot follow the normal behavior. You need to use the Beauty/Volume passes if you need to work with Volumes in compositing: