Mental Ray light bounce

[joske]

i had similar issues testing out exterior light setup in Mray :
when the ext setup was convincing enough the interior areas that are visible from the outside are very dark.
So there should be some more 'GI bounces' to light up these areas...

here are some posts that deal with this issue allready :

http://www.cgtalk.com/showthread.php?s=&threadid=124999&perpage=15&pagenumber=3

http://www.cgtalk.com/showthread.php?s=&threadid=117519&highlight=trace

sofar the only solution that worked for me was to tweak the algoritm. exposure control until the brightest and darkest areas are brought more together to even out the contrasts.
However this workflow is not very much to my liking :hmm:

in the post i referenced there is the suggestion of upping the reflect and refract + sum settings in the render popup window.
However imo the reflect and refract + sum settings of the photons is only for reflections and or refractions of objects, not the photons...
the mental ray material with a photon map like folical is using could be the thing you're looking for, haven't had the time to test it myself...

[Deadhead]

thx joske,

I recently was talking to folical and he told me to deal with trace depth and sum. I tried and I also think, that this is not getting any better cause it's only for reflection & refraction.

I did some test renders and what I think is the best, is increasing the global energy. With a high setting your scene looks bright enough and the light does NOT blow out bright areas.

[joske]

check out my test scene here deadhead :
http://www.cgtalk.com/showthread.php?s=&threadid=117519
I must say after testing the 'photon map shader' folical suggested i have to reconsider my previous post about the reflect and refract + sum settings of the photons beeing only for reflections and or refractions of objects...

lets try to continue this thread on the other one as well, there's no point in having a double thread about the same thing he? :shrug:

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.