Strange behaviour - Sweep Nurbs and emissive Materials

[KeeWe]

Hi guys,

While working on our last project, I noticed a strange, buggy behaviour when using an emissive material on a sweep nurbs. I did use a workaround due to a tight deadline, but am facing the same problem again.

In short: when animating a simple sweep nurbs via start and end growth, the object isn't emissive outside until a certain point. Please see the attached file. Am I doing something wrong or is it a bug?

Thanks!

[aoktar]

What is happening if you enable "double sided" in emission?

[KeeWe]

Ah that did the trick. I was trying to change the Side paramter inside the material tag, with no luck.

But I guess it is kind of a bug, since it jumps at a certain point, right? Using a spline wrap doesn't produce this behaviour.

Plus: It would be nice to not need double sided emission in case you just want the outside to be emissive. Would it be possible to look in to it? I know it's a rather specific case but maybe it saves someone else somt time in the future.

Thanks for the quick help!

[aoktar]

Ah that did the trick. I was trying to change the Side paramter inside the material tag, with no luck.

But I guess it is kind of a bug, since it jumps at a certain point, right? Using a spline wrap doesn't produce this behaviour.

Plus: It would be nice to not need double sided emission in case you just want the outside to be emissive. Would it be possible to look in to it? I know it's a rather specific case but maybe it saves someone else somt time in the future.

Thanks for the quick help!

I don't know, it's a C4D thing. But I'd not expect this behavior.
What you want that's not about us/me. There's a problem with generated object by C4D.