Hi chaps, it's been ages (years) since I've used mental ray, but I clearly remember rendering ice particles with the mental ray volume renderer and motion blur. It was very slow but it worked. Now I have to do something similar again, I can't for the life of me get it to work, the cloud is cached and motion blur works as expected with a phong but not a volume render. MB set to end on frame. The camera is static. Anybody remember a specific hoop that needs to be jumped through?
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