Jump to content

htoa comp volume AOVs

Recommended Posts


I have been trying some volumetrics with Arnold and they seem to work really fast. But I have an issue with recreating Beauty pass in compositing.


Arnold can output 4 AOVs for volumes: volume (beauty), volume_direct, volume_indirect and volume_opacity. In my scene I am not using indirect lighting for volumes so volume_indirect is empty. Therefore volume (beauty) = volume_direct.


But I don't know how to composite volume and volume_opacity AOVs as they both have RGB data. If volume_opacity had only one channel I could maybe set it as alpha for volume AOV.


All AOVs in Arnold should be composited with additive operation (plus or screen) but it doesn't seem to work for volumes. Any ideas?



Edited by Juraj Tomori
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...