Use Vertex Normal tag

[c4d-Jack]

The 'Vertex Normal' tag often comes with imported CAD meshes and (in most cases) helps to get the correct shading for those ugly CAD meshes. I suppose the tag is not yet taken into account, since CAD meshes often produce strang shading.

But since it sometimes also happens with booled meshes, it may also be a bug when working with geometry with bad triangle structure.

For example this one.
You can see that the shading is broken at locations with curved geometry.
http://www.c4d-jack.de/darkside/vray/metall_test_2_vray105.jpg

For easy comparison, here is a rendering of the same model I did with Advanced Render:
http://www.c4d-jack.de/darkside/vray/metall_test_2_ar.jpg

Greetings,
Jack

[stefan]

ok good suggestion, can you send me this file so i can give it Daniele and Renato?
thanks
stefan

[c4d-Jack]

Of course, here it is:
http://www.c4d-jack.de/darkside/vray/Rohre_und_Flansche.zip

I can also send it directly to Renato ;-)

Greetings,
Jack

[DanieleF]

Thanks for the file Jack,
i'll give it a look.

Cheers
Daniele

[Jan]

I second that! It is vital as soon as you work with imported data!

Jack, have you cheked on the dircetion of the normals? cause I have noticed that Vray only has a problem when the normals are pointed inwards (seems a bit strange), the standrs cinema renderer does not have this problem.
Unfortunately we can´t touch any of the exported geometry...., cause it will demolisch the normal tag...

...while writing I rechecked the issue, and Ican defenenetly say that vray is tkaing the normal tag into consideration, it does make a diffrence if I throw it away....

ciao Jan

[stefan]

hi guys, we changed that for next update:-)
cheers
stefan

[Jan]

hi guys, we changed that for next update:-)
cheers
stefan preforming like hell! :wink: It´s great, alot better than the other GI render engine available

ciao jan