3ds max – Use the Particle-Flow Lock/Bond test to have particles move on a surface in

Software:
3ds max 2019

The Lock/Bond Particle Flow test can be used to have particle movement restricted to a surface.

lock_bond.gif

This example shows a simple setup in which the particle teapots have a Speed operator set to Random 3D mode that causes them to move in random directions,
While at the same time the Lock/Bond test forces them to ‘stick’ to the surface:

Untitled-1

 

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Blender Sub-D impact on animation playback

Software:
Blender 2.78

I noticed that the Subdivision Surface modifier in Blender significantly slows down the animation playback even if the mesh isn’t animated,
So my advice is, either apply the modifier when possible or set it to be disabled in viewport and enabled only in rendering.