Color bleeding

[Ivan_m]

I have a problem with mental ray. When I render my building I get nasty places with color bleeding. I've tried with photon base shader in the photon slot of the material, but it didn't work. Any suggestions? I've used max 2008. Any suggestions?

[SandmanNinja]

Can you post a render? It would help with the answer.

 

And I'm sure Brian Bradley knows! He's a Mental Ray guru!

[Ivan_m]

Thanks for the replay. I'll post a image with the problem as sooner as I can.

 

In this one you may see the color bleeding and the reason - the grass:

 

In this one the grass is removed:

 

The reason I don't like using MR is exactly because of the color bleed it creates. :/

Edited May 25, 2008 by Ivan_m

[Justin Hunt]

colour bleed can be controled either by droping the "Diffuse Level" or using the material over-ride for FG calculation and the proper material for the frozen FG, final render.

 

With max2009 you have the option now for objects not to react to FG.

 

jhv

[pixelperfectg]

http://jeffpatton.cgsociety.org/blog/archive/2008/1/

[kris McIsaac]

One thing to remember is that in real life grass is not a flat plane. It is thousands of blades at thousands of angles and slightly transparent so not all the light is thrown back up onto the surrounding objects. Like it was mentioned, reduce the diffuse colour to reduce the amount of green bounce.

[Ivan_m]

Thank for the help and for the attention. It helped me a lot.

About the grass - in the final render I will use a displace map for sure.