smoke like artifact in mental ray renders :(

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

Thread Tools Display Modes
  10 October 2012
Angry smoke like artifact in mental ray renders :(


I have been trying for nearly 5 days now to get a splotch free renders out of mental ray to no use.
Tried almost every tweak imaginable although the scene is fairly simple.
My scene has 5 types of textures, 2 semi-gloss, 1 metal, and 2 self illuminated textures.
I did not use any kind of texture maps, just plain colors along with the desired effect settings (glossiness, self illuminate, reflection etc).
My main interest was to illuminate the scene (interior scene) without using any lights except the self illuminated textures in the areas where's supposed to be glowing lights (neon lights).
I use FG on mental ray with no GI, a density of 1.2, rays count 200, no diffuse bounces and 4-16 sub-sampling and mitchell filtering and shadow set to segmenting and scanline off. I render using backburner on multi-workstations. By frame FG renders are done first, locked then final render is done with read only and no interpolation since i find interpolating between FG frames causes more nuisance to the animation. oh, I have camera flying through and moving objects in the scene.
renders are quite good in terms of lighting, but the smoke like jittery artifact is hard to kill.
Any suggestions?
  10 October 2012
Using self-illuminating materials usually gives very poor lighting results
The Z-Axis
  10 October 2012
I have the same problem with an exterior but using fg gi. The lit areas are great but the shadows are blotchy. My problem is my settings so we both will have to follow a good tutorial.
The terminal velocity of individual particles is directly related to pink rabbits on a bank holiday.
Characters, Games, Toys
  10 October 2012

you can try the workflow importon + FG. Look here:

hot chip
  10 October 2012
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
Thread Closed share thread

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Society of Digital Artists

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump

All times are GMT. The time now is 11:27 PM.

Powered by vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.