Particles Randomly Rotating

Hello, I am trying render a particle system where the particles are textured planes, but sometimes the particles will rotate, and then randomly stop rotating. If I start the animation again, sometimes they wont rotate, and sometimes they will rotate for a different period of time. Does anyone know how to stop this? Is this a bug? Here is a video of what I’m talking about.

Particles panel --> Cache tab --> Cache Step: 1.

The default value is 10 which means than Blender stores some real values every 10 frames only and has some fun in between… errr… interpolates in between. :wink: The least we can say is that the interpolation isn’t very good in every situation.

With a cache step of 1, it consumes more memory but you avoid any interpolation.

Thank you, that fixed it! It’s always the little things…