Particle Collision Issue

[bdg]

Hello, i have a collision problem of two types of particles. I try to blend them in a container.
I tried everything, but they intersecting. The collision between the different types of particles does not work well. Anyone has an idea?

[d4rk3lf]

In the Particle Physics operator, on the bottom you have option "draw collision shapes".
Turn that on, then tweak multiplier option, until they match your spheres in radius.
When you are done, turn it off (because it can slow the viewport)

[bdg]

Thank you for your reply, this helped a bit. 


I think there is a further problem. In this case the particles where crushed? Maybe its a force problem?

[d4rk3lf]

Depends on their speed.
If they feel at high speed because of gravity, then calculating each frame won't be enough for proper collision.
That being said, select TyFlow object icon, go to modify panel, and under settings, set time step to 1/2, or 1/4... per frame... the lower you go.. the slower will sim be.

The collision shapes looks good now, btw.

[bdg]

Thank you very much, this helped a lot! The particles now staying inside collision container. 

I tested some different settings, a slow time setting make some strange results, the particles are "glued" around the collision container.

[d4rk3lf]

So you have collision operator too?
Glue.. like stuck?
Did you try to reduce default friction parameter in collision operator to zero?

[bdg]

Yes i used the collision operator, all friction parameters was at 0.0 and 0.5. After i changed the time steps to 1/4 everything was ok.

Now i have another problem. I started complete Animation with 1000 frames, but 3ds max crashed to desktop at 400 frames. 

Is there a way to avoid a new calculation after restart a Rendering? So i dont have start at 0.

[d4rk3lf]

The only way I can see would be to create Tycache of the particles, but you can only do that with Pro version.
You can try and export alembic, then import it back and render.