CGTalk - Black splotches when reflecting with final gather

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titopte

09-26-2005, 06:58 PM

hI,
i´m having trouble with mental ray and FG.
i´m showing an example scene, but happens every time i use some raytraced reflection and FG.
when i lit the scene just with hdri or skylight i got these black dots witch appear to be something related to FG samples.
the material from the sphere is a MR shader, where i have tryed lume metal, reflect base, and raytraced (3ds) on the surface slot.
here´s a test
http://patagoniaotra.com.ar/mato/hdri.jpg

i have tried controlling the photons, but that doesn´t seems to work.
I remember seing something similar here in cgtalk, but i wasn´t able to find it.
For more information, here´s another render with smaller radius in fg and another filter nº:
http://patagoniaotra.com.ar/mato/hdri2.jpg
i can blur the spots by setting bigger radius but thats unaccurate:
http://patagoniaotra.com.ar/mato/hdri3.jpg

could anyone have a clue on what´s happening or what settings am i overlooking?
thanks in advance.
cheers

titopte

09-29-2005, 08:29 PM

i figured out which setting was messing all up.
apparently when i put an hdri in the environment slot of the MR material (environment 3dsmax) the dots start to appear. everything works fine if there isn´t a mep there.
i can put the hdri in the global environment for reflection, but is there a way to override it within my MR material? just when i though i started to understand MR....
thanks

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09-29-2005, 08:29 PM

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