I have huge problems with my qualities in mental ray / maya image based lightning.
I have a szene with a car and a sphere as the image based lightning material.
I light up the szene with only final gather.
I just keep having spots and some kind of strange shadows on particular geometries like on the roof profile of the car in my szene.
I played around with all the attributes. But when I delete this special geometries this spots vanish.
How Do you guys increase quality in HDRI LIghtning....
Do you shoot some photons in the szene!
Cheers
Devrim