Hello all,

i have an animated object that I am using as a collision object in a smoke simulation. I find that I “loose” a lot of density that gets stuck in the colision object.

I have a feeling that I might improve on this by making sure the collisionvel field (which I think is used by the Gas Enforce Boundary node) is filled in correctly.

unfortunately, I cannot find a way to fill this. I have a geometry object that has some animation at the object level. How should I go about getting the velocity from the object and getting it in the collision velocity?

Any help is appreciated,

Koen

Look before you ask :-) The field seems to be filled in automatically, when I apply a vector field viz, I can see the vectors there. Unfortunately, this does not help me with loosing all my density.

Koen

Thanks! I thought I had seen that toggle somewhere, but I was staring to much to find it :-)

Unfortunately, it did not solve the problem,I am still losing all of my density.

I'll keep trying and if I find something I will keep you posted (I am considering adding a setup derived from the target driven smoke setup from an earlier thread to add forces that push the density back into empty space.)

Thanks again,

Koen