Motion Blur Substeps?

[RemoGambacciani]

Hi guys,
any idea how to improve the motion blur substeps?

I would expect the MB of a single matrix (white line) being as smooth as the spline it follows (red line).
The spline is uniformly subdivided (no render subdiv/smoothing involved).

Seems like there are missing the subframe information (even when cached...).
The transformation/deformation steps doesnt seem to help...

Hint appreciated
Cheers, R.

MB_Scene1.c4d

[Dr. Sassi]

Hi RemoGambacciani,

Please have a look here.
CV4_2025_drs_25_RSmb_01.c4d

The Deformer can stretch the line, so the steps become rather large.
It looks different if you use the Bend deformer with "Keep Length" active.

All the best

[RemoGambacciani]

Hi @Dr-Sassi , thx a lot for the quick answer.
It does change something if you turn it on/off but doesnt seem to have an impact to the low subdiv look, or does it?

KeepLegthOn

KeepLegthOff

[Dr. Sassi]

Hi RemoGambacciani,

If you use my setup, then it is pretty much the same (keep length on or off), as I have set up the deformer in that way,

Below is a comparison: Green is mine, and Red is the file I got.

CV4_2025_drs_25_RSmb_02.c4d

In the Red Version, the line is stretched, resulting in the more pronounced step.

All the best