Nasty falloff BUG?

[Zdravko.Keremidchiev]

Can you share the scene?

[anthonyh]

hi,
sure, attached.
hmm, i just checked it again. apparently the square was an object in front of the plane so that explains the square `pattern`. however the material on the bumpy plane has a blend material to give it a coat and it`s the coat material that needs the opacity mode set to normal or you get this noisy effect while rendering either progressive or bucket. i had to replace the original object with a teapot but it shows the same thing. the opacity mode of the object in front doesn`t seem to matter.
anthonyh

[Zdravko.Keremidchiev]

Thank you for sharing the scene. I made a note about the issue in our bug tracking system.

[anthonyh]

hi zdravko,
good luck and thanks.
anthonyh