Particles don't collide with rigid bodies I have a scene with 2 Cubes, Cube 1 (using a soft body (Rigid body doesn't work either))falls through Cube 2, and Cube 2 has a particle system on it. I want Cube 1 to "push away" the particles on Cube 2 however, goes straight through. I have Collision physics on Cube 1, but it doesn't seem to interact with the particles at all.

Here is my .blend file:



also: to clarify, i don't want the two cubes to collide, I want the particles on Cube 2 to colide with Cube 1
I see what you were trying to do with the Soft Body Physics, but what you really need is a Rigid Body Physics simulation. You can learn a bit about it in this quick, fun tutorial, but it is basically a simplified physics engine for gravity and whatever else you want to have affect your meshes.

For the falling-through-the-bottom-box issue, I turned off Collision Physics for all of the meshes except the floor because it has to deal with the particles. I changed some settings to make the particles bounce nicer. I also added all of the meshes to the Rigid Body Physics simulation. You can tell this because when you select them, the outline is green instead of orange. Additionally, I adjusted the particle settings so that they began emitting at the collision of the two boxes.

Final result:



Here is the modified .blend file: