question to itrees material

Common Common :: Render Theory
1

hi

we recently recogniced big rendertime differences with the itrees- leaves material. maxdesign2011x64 vray 1.5 sp5

the vraymaterial of the leaves without opacity/refraction is packet into a vraytwosidedmaterial.
the backmaterial is empty and not checked.the translucency amount is about 45.

first i don´t really understand what this twosidedmaterial does…i get exactly the same result for beauty and alpha
and second, the rendertime with 5 trees behind eachother differs from

translucency grey 55 seconds
translucency black 42 seconds
translucency white 31 seconds

can someone please explain it for me?

thanks alot for help
thomes

itrees.jpg
itrees.jpg339×195 51.4 KB

2

This might be useful:

3

thanks tiw

i thought i know someway how 2sided works…but…

coul´d you please look into this material and say what this material should do?

and why there are that big rendertime differences…i think that woul´d be a question going to vlado…

thomes

4

Just for point that maybe this is solved in Vray 2 SP2, looking at changelog:

(*) Optimized the VRay2SidedMtl material for GI calculations when translucency is greyscale;

5

oh…that looks good.maybe thats the problem…maybe someone with itrees and newvray can test it.

thanks peprgb