CGTalk > Software > Autodesk 3ds max
Login register
Thread Closed share thread « Previous Thread | Next Thread »  
Thread Tools Search this Thread Display Modes
Old 10-05-2012, 12:05 PM   #1
New Member
Mahmoud Fattouh
Creative Director
Beirut, Lebanon
Join Date: Feb 2011
Posts: 21
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?
Old 10-05-2012, 04:43 PM   #2
darthviper107's Avatar
Zachary Brackin
3D Artist
Precocity LLC
Dallas, USA
Join Date: Feb 2004
Posts: 4,109
Using self-illuminating materials usually gives very poor lighting results
The Z-Axis
Old 10-09-2012, 09:02 PM   #3
Kanga's Avatar
Chris Kautz
Freelancer/Character artist.
Join Date: Feb 2004
Posts: 9,566
Send a message via ICQ to Kanga Send a message via MSN to Kanga
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
Old 10-09-2012, 10:39 PM   #4
thorsten hartmann
hot chip
thorsten hartmann's Avatar
Thorsten Hartmann
3D Artist
infinity vision
Berlin, Germany
Join Date: Oct 2004
Posts: 1,387

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

hot chip
Old 10-09-2012, 10:39 PM   #5
CGTalk Moderation
CGTalk Forum Leader
Join Date: Sep 2003
Posts: 1,066,478
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

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 03:35 PM.

Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.