Anisotropic volume fog + Mental ray ?

[Svan]

http://www.mentalimages.com/4_5_special_features/images/big/cornell_box/_003.jpg
(like this) ???

[cpan]

ofcourse you can... that image is in the mray docs :D
assign parti_volume & parti_volume_photon shaders to the outer box, then set the nonuniform attribute to a higher value ( eg .75 ), enable caustics and hit render.

PS. in max i think you have to put a photon shader to any material group in the scene, else you will get 'no photons stored after emitting 10000000 photons blablabla' warning.

[Svan]

It works only when the scene is very little(after a big scale down) because I can't scale the nonuniform noise.How can I scale it?(I wouldn't like to rescale my scenes)

Sorry for my bad English

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