View Full Version : problem with mental ray, volumetrics, and transparency

09 September 2006, 01:36 AM
an interesting problem: I use mental ray in conjunction with volume fog and a volume (direct) light, then create a blizzard particle system with facing particles, and then apply a radial opacity map to make nice-looking snowflakes ... or not. I run into this problem .... (just volume light) or (volume fog and light)

Really not sure whats going on, looks like anything transparent becomes pitch black/opaque

tried changing opacity output settings, using mental ray shaders, fiddling with material reflection and refraction, light shadow options/exclusions... and nothing works.

Any help obtaining fuzzy transparent snowflakes would be, well, really very helpful

Using 3dsmax 8

11 November 2006, 06:07 PM
Yes, men. This is the old problem.


But I didnīt get a accaptable solution so far.

Anyone some new ideas or work arounds?

11 November 2006, 02:18 PM
Seems not.

Ok then. Back to After Effects and rpf files :)

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11 November 2006, 02:19 PM
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