I'm pretty new to Maya and I've just begun working with mental ray. I'm trying to create some lit fog/ light rays so I'm using a volume primitive with fog and a spotlight to try and create this effects. I've adjusted all my setting so ray traced shadows and illuminated fog works etc but I still have one problem.
When I try to render it using mental ray it doesn't pick up the fog at all when the "illuminated" setting is enabled on the fog. All I get is a really grainy picture with what looks like a water mark symbol in the center of the screen. I've tries messing with samples and every other setting I can find on Render setting and no matter what I do it's not making a difference.
Someone please help me, this is driving me up the wall!