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View Full Version : shave and haircut major rendering problems NEED HELP

kybel
09-28-2009, 06:35 PM
so i made a quite realistic model and want to put hair on it

http://img121.imageshack.us/i/rdr.jpg/http://img121.imageshack.us/img121/7047/rdr.jpg
(any tips on how to reduce the grain ?)

but the problem is that my hair totally ignores lights
when i used the buffer method , there is no shadowing happening, and even if i add an hdri dome into my scene , the hair stays exactly the same

http://img25.imageshack.us/img25/7171/hdrfuuuuuuuuuuuuuuuuuuu.jpg

so i tried the hair primitives method , which is suposed to be used when rendering with mr , but the hair comes out completly transparent

http://img49.imageshack.us/img49/741/prim.png
(no lights used so the transparency of the hair can be easily seen)

any suggestions on how to fix this ? cause i have really no idea , i tried almost everithing (everithing that renders under 24 hours . cause sometimes i dont know if its rendering or if it freezes. and i know that shave renders quite fast)

http://img97.imageshack.us/img97/5066/17414892.jpg
here are my shave globals
http://img121.imageshack.us/i/rdr.jpg/
Galakgorr
09-28-2009, 07:08 PM
use mr hair prims, light with spot lights only, render the hair as a separate pass and composite in post.

on the spot lights, add shave shadow attributes and start with a resolution of 1500 and a fuzz of 30. you can tweak it from there. use detail shadow maps, and in the spot light mental ray settings you can tweak samples and softness (softness is very sensitive, try .02 as a start) to get rid of artifacts in the shadows.

set your render settings to Production Rapid Hair as a start. you have to use the rasterizer for mr hair prims, which is why it's usually best to just do the hair as a separate layer.
kybel
09-28-2009, 07:34 PM
use mr hair prims, light with spot lights only, render the hair as a separate pass and composite in post.

on the spot lights, add shave shadow attributes and start with a resolution of 1500 and a fuzz of 30. you can tweak it from there. use detail shadow maps, and in the spot light mental ray settings you can tweak samples and softness (softness is very sensitive, try .02 as a start) to get rid of artifacts in the shadows.

set your render settings to Production Rapid Hair as a start. you have to use the rasterizer for mr hair prims, which is why it's usually best to just do the hair as a separate layer.

messing with the rasterizer help solving the transparency issue , its on a good way now , thanks a bunch buddy
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