04-05-2012, 01:45 AM
Well, you cant really do a zdepth that is meaningful for transparent objects...
Thank about it... if black is 20m from the camera and white is 10m from the camera and you have a 50% transparent smoke at 10m, the zDepth would be giving you 50% gray (not white!), putting the smoke at 15m??? see, dosent make sense
Then you have the problem that each pixel of smoke needs to represent different depths as you can see through the smoke.
The only real workaround is to render out deep pixel data. You can get a version of vray that supports saving out deep pixel data and comp it in the latest nuke that has deep pixel support. Chaos group has a nuke plugin to bring in the deep pixel data from vray.
Thank about it... if black is 20m from the camera and white is 10m from the camera and you have a 50% transparent smoke at 10m, the zDepth would be giving you 50% gray (not white!), putting the smoke at 15m??? see, dosent make sense
Then you have the problem that each pixel of smoke needs to represent different depths as you can see through the smoke.The only real workaround is to render out deep pixel data. You can get a version of vray that supports saving out deep pixel data and comp it in the latest nuke that has deep pixel support. Chaos group has a nuke plugin to bring in the deep pixel data from vray.
Jordan Walsh
VFX Technical Director
Showreel 2012
Check out my scripts on ScriptSpot!
VFX Technical Director
Showreel 2012
Check out my scripts on ScriptSpot!