UNHANDELED EXCEPTION - When rendering an animation of an animated spline object

[ICMS]

Hello Chaosgroup

I have a scene that crashes at some frames while rendering, I can see the message "UNHANDELED EXCEPTION" in the console before max closes without any prompt just POOF gone.

I've pinpointed the problem to a spline object that is animated. No matter what I try Sweep/Loft/Spline set to renderable. Whenever a shape is the baseobject and it's animated. even with Spline IK Control it just crashes at some frames.

Is this a known issue?

Changing default geometry type to dynamic changes the frames at wich it crashes, but there seems to be a deep down problem with rendering animated splines. I tried all kinds of settings in the sweep/loft but the problem keeps occurring. Only when I hide the animated spline objects the scene renders fine. Also the frames on which it crashes are not persé the frames that have the spline animating/changing, it happens on random frames in the animation.

[nikoleta.garkova]

Hi ICMS

Made a very simple test, but cannot get such issues - can you forward a sample scene file with the issue reproducible so we can troubleshoot? You can send it via our contact form, just make sure to mention this thread (or my name) in the email, along with details about the exact V-Ray/3ds max versions and your GPU/GPU driver details. Much appreciated!

[ICMS]

I'm sorry, maybe description should have been more clear. It occurs when the spline 'vertices' are animated (for instance with SPLINE IK CONTROL modifier and animate the helpers), or just animate the position of the vertices. So the shape itself deforms. I see in your example that the spline object is static but the transform is animated.

Let me see if I can build a test scene which reproduces the prbolem, as currently i have it in a big animation scene.

[nikoleta.garkova]

Hey, sorry - tested by animating the vertices but still not getting any issues. In case you are not able to replicate it in a fresh scene, you can strip down the original one and forward it to us. Thanks!

[ICMS]

I managed to replicate it, it also is important to know that it has to do with motion-blur or depth or field. You need to have them enabled.

I will sent in the scene with the form!

[ICMS]

Ok so here is the scene (I think it didn't upload in the contact form for some reason):

PLEASE NOTE: Render the sequence a couple of times (its fast) as this error is not very consistent. so just render the whole sequence 4 or 5 times in a row and I 'm sure you'll get the error. Don't close max, just re-render it couple of times and you'll see the unhandeled exceptions in the vray log...

[nikoleta.garkova]

Hey ICMS,

Thanks for providing the sample file. Unfortunately, I am still unable to reproduce this (see here). I might as well just try it out a few more times. Does the same happen if you render with CPU, or is it GPU only? What if you update your GPU driver versions? What are the exact V-Ray/max versions so we can be sure we test in a similar environment?