Velocity RE problem

V-Ray for 3ds Max V-Ray for 3ds Max :: Issues
1

Hello,

I’m facing a weird issue, when doing an additional pass to get only a VRay-Velocity RE. You can see what I’m getting on several frames on the enclosed image … the scene is pretty “simple”, the only tricky part is that geometry is somehow self-constructing during the animation :wink:

Any help would be greatly appreciated !

Thanks in advance,

Regards.

VRayVelocity-problem.jpg
VRayVelocity-problem.jpg1280×720 92.2 KB

2

is there any objects which have skin wraps on them? you may want to try applying turn to poly modifier on top of your geometry and see if it helps.

3

Hello :slight_smile:

Thanks for your fast answer. No skin wraps in the scene … the thing that could be the most “tricky” for the renderer to handle is maybe the animated volSelect with DeleteMesh on top ? The weird thing is that this kind of problem doesn’t appear on each frame, but regularly during the animation :frowning:
i’m testing right now with an Edit Poly mod on top of the object using VolSelect & Delete Mesh, since it’s the only object that seems to make problems appear !

Thanks again for your suggestions.

Regards.

4

oh crap … it’s still the same :frowning:
I’ll see if I can post the video of the Velocity RE images sequence for you to see the problem completely :wink:

Regards.

5

Hello :slight_smile:

Here is the Velocity images sequence compressed as video, for you to see the problems I have …

http://dl.dropbox.com/u/717963/VRayVelocity_stairsScene-problems.zip

6

Try using mental ray or scanline to render out Velocity pass- see if they can get u want u want.

7

Hello Dadal,

Thanks for your suggestion, but tbh, I’d rather get VRay computing correctly this RE … and not needing to switch renderer for this or that particular stuff :frowning:
I’d like to get the opinion from someone at Chaos Group, maybe is it a mistake I made, or a bug that could be solved pretty easily or … a limitation ?

Thanks again.

Regards.

8

Thats why I suggested mental ray and scanline.

If they will give u the same results then its 3ds max/ geometry issue…

9

okok, I’ll try to test that today … I somehow hope it’s a VRay problem, because if it’s due to 3dsmax, I’m f****d :frowning:

10

Ok it’s confirmed, it’s a VRay problem … std 3dsmax scanline renderer outputs perfectly Velocity RE !!
Please fix that in VRay …

Regards.

11

try add reset xform modifier and edit mesh on top… See if they would fix it… then see if mapping coordinates could cause it…

12

Still the same …