I want to make the falling autumn leaves.

I made a system of particles and the surface on which they must fall, but the problem is that even at the maximum value of "Particle Friction" parameter of the surface (collision modifier), the leaves (particles) continue to slide along the surface, and much too quickly.

How can I make them completely stop? And can I adjust the speed of sliding between a full stop and a very slow slide?

  • 1
    $\begingroup$ it is advised to ask one question at a time, or combine them to look like one :) $\endgroup$
    – Chebhou
    Apr 21, 2015 at 9:35

1 Answer 1


There are two basic ways to approach this problem through particles and collision objects:

First is not very suitable for animations, since the leaves freeze at the moment they hit the collision object. You basically check the "Die on Hit" and "Died" check-boxes in the Particle settings.

Check-boxes I mention are highlighted with violet

Second is more suitable for animations since the leaves move a bit even after hitting the ground and come to a stop smoothly. Here you DON'T check the "Die on Hit" and "Died" check-boxes but you edit the settings for the collision object itself. Namely the Stickiness and Friction Factor values.

Again, mentioned in violet

Either way, the big problem is keeping leaves not going through the ground thanks to rotation of the particle - the collisions don't take into account the shape of the leaves. I would need more context to choose a solution for this. One solution would probably be to let the leaves rotate only around Z axis (thus not going through XY planes) which would tamper with the animation of their fall though and work only on absolutely flat XY planes.


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .