studio rendering reflective objects with yafray

Artwork Focused Critiques
1

hi

i have quite some difficulties useing yafray and the cornel box idea
to reproduce realistic looking renderings of silver table ware.

since some hours i am trying one test rendering after the next one
read through all the tips on yafray.org but still somehow something
is missing.

could somebody maybe give me some tips? here is a sample scene.
http://x10.putfile.com/10/28113112239.jpg
http://www.jrkuhnen.de/blender/eggcup2.blend

as you can see the shadows below are by far to dark and when i increase the GI power highlights start to wash out. i just used the same cornelbox setup you can find at the yafray site.

thankx a lot

claas

2

well i guess yafray has a bug here.
refelctions show black refelctive objects while
i have raydepths higher than 5

i guess that explains the physical problems i have with yafray
compared to mental ray.

http://x10.putfile.com/10/28117390161.jpg

3

and another problerm with a different setup.
finaly i was able to get the smooth result but i noticed again the
problem with dark areas in refelctions. for some reason refelctive
objkects doi not get reflected with their refelction. they are black.

http://x10.putfile.com/10/28118324328.jpg

any help how to fix that?

4

Nobody has the same issue with the rendering and balck reflections?

claas

5

Could you post the blend files for the last two images where you are having black patches in the reflections?

Judging by the image alone, I would say there must be something wrong with one of your materials. I say this because, in the image with the cornell box and the 3 balls and that curved object, you can see a ball reflected in another ball, but the curved object appears black. The curved object even reflects itself at some point and there too it appears black. Strange.

6

ya it is strange. i noticed that i have to invert the normals to make it work, but that cannot be ok.

i will post the file soon.