Maya Training

Creating characters In Maya and Zbrush

Maya Training

Creating character renders in Maya 2017 and Arnold

Maya Training

Spach-Alspaugh House the complete courseware
You are here > Home > SimplyMaya Community Forums

Welcome to Simply Maya

Please Sign in or Sign up for an account

Member Login

Lost your password?

Not a member yet? Sign Up!

Old 07-10-2002, 09:51 AM   #1
Registered User
Jim's Avatar
Join Date: Jun 2002
Location: Adelaide Australia
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Default Mental ray _GI and final gathering settings????/

Hi all,

Just curious to find out what types of settings people are using for 'Production' Quality (in Mental ray for Maya settings) to achieve decent but not too slow GI renders?


GI accuracy ??????
GI size????

Final gather accuracy ????
Final gather size ????

This would be very useful as I'm currently using a P3 450 which for this sort of stuff is extremely slowwwwwwwwww..

re Jim
Mayan elder......only in years.....
Jim is offline   Reply With Quote
Old 07-10-2002, 10:54 AM   #2
Registered User
Join Date: Sep 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts

if you don't need real acurate gi solution , try to use Final Gather alone (settings depend of your scene).
you will get a gi like effect (color and light bleeding) for a really shorter time
toniobe is offline   Reply With Quote
Old 07-10-2002, 05:55 PM   #3
undseth's Avatar
Join Date: Aug 2002
Posts: 1,135
Thanks: 0
Thanked 0 Times in 0 Posts


Im still a newbie, but if you use mentalray when doing ONLY FG, you would (best i think) want to push the accuracy to over 1000 (1000-4000).

-With min-radius equal to a tenth of the max-radius;
If you dont get the results you like, try these settings;
Min-radius = 0.01
Max-radius = 0.1

or even better

Min-radius = 0.01 (or 0.001)
Max-radius = 0.01

-If radius is set too low, it produces a "low-quality-jpeg" pic, i think. (correct me if I am wrong)


-For production results with GI ALONE, i usually push accuracy to max (usually 30000, on my machine).

-Radius can be set automaticly by setting it to 0.
-Raduis is relative to scene size i think.
-Else try to testrender, and start off with small radiuses, AND exposure to 1 (not 2 like in "realistic exposure")
-The exposure = 1 lets you see more clearly the size of the area lit by the individual photon.
-If you increase the number of photons in a shoot, i guess the radius can be smaller, contra a scene with fewer photons.

I have tried this once but i do not render much these days. And I am NO expert in mentalray (hard to find anything useful on the net, unless you code you shaders yourself i feel).

-With limited processor power/time, I think I will explore the combo solution sometime in the future. Meaning a "medium" FG WITH a "medium" GI, a little of the both.

-Still FG radius would have to be set good, i think.

-GI accuracy setting can be lowered good, but not the radius, i think.


-FG accuracy setting can be lowered good, but not the radius, i think.

I think this would produce decent renderings in shorter time. But let me know if you want to add anything, as I am puzzled by mentalray settings myself.
I do not support Bush! Nor Saddam! Long live UN!
undseth is offline   Reply With Quote

A little bit about who we are
Links you might find useful
Catch up with SimplyMaya
SimplyMaya specialises in Maya tutorials. We offer over 1,000 individual Maya training videos, ranging from basic Maya tutorials through to intermediate Maya tutorials. Our tutorials are created by instructors with industry experience and are designed to get you up and running in Maya quickly without making it seem like hard work.

Copyright © 1999-2017 SimplyMaya - vBulletin® Copyright © 2000-2017, Jelsoft Enterprises Ltd.