Hello,

I'm working on some threads blending in. This is a preview:

There are still two problems in that shot:
First, the points generated by sweep on the original curves are not consistent. So I have some flickering and gliding effect.
Second, I didn't know a way to render this with correct motionblur.

So I changed the algorithm to having the complete curves right from the start with consistent point numbers. They are not trimmed anymore, the blend-in effect is entirely controlled by pscale now. Also I use Nurbs Curves to have the shapes interpolated automatically. The curves are imported to Solaris correctly. But when I try to add motion blur, the attributes are not updated anymore, neither P nor pscale. However it seems, checking/unchecking "Always Include Frame Sample" on the motionblur node forces a refreshing of the cached attributes.

Do you have an idea how to make it cache correctly on every frame of the animation?

I fixed the motionblur node inside now. I changed the Cache Behavior to "Cache Current Frame Only". That works correctly though it causes a hell lot of data for my vram.

Are you using velocity blur?