Smoke spreading under ceiling

Hi!

Is it possible, with a particle system, to spread smoke under the ceiling.
The particles should change the direction (maybe random) on collision, so that the particles move along the ceiling.

Thanks!

 

Hi,

particle system has collision module, set it to Type world (to collider with world objects),
there is dampen and bounce settings too.

 

Maybe i'm wrong, but i can't see any solution for my problem by changing these values.
The particles should not bounce. A particle should hold it's y-position on collision and the movement must take place on the x- and z-axis.

 

if bounce is 0, and dampen is 0,

 

The Problem is, that the particles move only to ony direction.

 

You can enable Noise or Force over lifetime (randomize) modules so the particles are moving in different directions.

 

Thanks!

Changing the values of "Velocity Over Lifetime" and "Random Between Two Constants" solved the problem,