weird faces....

[MarioRothenbuehler]

dear vray team i have weird splotches on my geometry....



i have checked the following settings

-double side geometry
-double side material option
-reflect on backside material option
-overlapping geometry

but nothing helps...... what do you think is the problem....

many thanks for your help and with best regards

/.mario'

[instinct]

Definately looks like coplanar faces. Raise the secondary Ray Bias (Global Switches Rollout in the Rendersettings) to something like 0.001 or 0.002

Thorsten

[aphex79]

or delete them..

[vlado]

If you do have double faces, try increasing the secondary rays bias in the Global switches rollout to a small number like 0.001 and see if it helps. If you don't have any double faces, you can try to rotate the model slightly in one direction. If this still doesn't help, please email me to vlado@chaosgroup.com

Best regards,
Vlado

[Paul Oblomov]

I think this is NURBS geometry. Try to rebuild those areas, where you have that looong (or wide) polygons. Manually.

[MarioRothenbuehler]

i have changed the secondary ray to the value 0.001 and 0.002
but nothing helps.... vlado i prepare the scene for you....

ps. yeah it is a nurbs model from solidworks

/.mario'

[Syclone1]

ps. yeah it is a nurbs model from solidworks

/.mario'

*cringe* I get buggard faces like that all the time as all the models I use here are imported from solid works in to max with Poly Trans and its not only vray but MR and Scanline also. Its barely acceptable normally but when doing cutaways like you are there then lately Ive been just rebuilding the part in max that's giving me the troubles...

-dave

[MarioRothenbuehler]

vlado i have sent you the scene...

/.mario'

[MarioRothenbuehler]

vlado, i have rendered the scene with the new version you have sent to me..... it looks perfekt...

many thanks...

/.mario'