I recently discovered that my render times increased when my particles (xParticles) started to die if I used both motion blur and particle lifespan variation.
If I don't use motion blur or if I leave the particle lifespan variation at 0F, all is well, render times don't increase.
2023.1.3 [R5]
C4D 2024.5.1
Fused 2024.3
(Render times are ok with redshift)
Here is a simple C4D scene in attach.
(in a little more complex scene it goes from a few seconds per frame to render to 7 minutes per frame... so with a constant amount of particles).
