question to itrees material

[thomes]

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

[tiw]

This might be useful:
http://www.peterguthrie.net/blog/200...torial-leaves/

[thomes]

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

[peprgb]

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;

[thomes]

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

thanks peprgb