Someone from another forum mentioned to me something about the thickness of an object in regards to fluid simulations.. it seems I need to add thickness to imported geometry in order to have it interact with fluid (so it doesn't pass through).. I can't find a thickness SOP so I'm hoping someone can point me in the right direction about how to add thickness. Thanks

yes, you need thickness because position calculation is not continuous, but discrete - it's calculated every so often, based on the timestep. so if a particle is moving too quickly, by the time a collision has to be detected, the particle may be past the collision region.
this applies whether you are talking about particles or particle-based fluids or grid-based fluids.

how to add thickness - you can extrude a (polygon) surface.

Ok I understand now what it means then.. thanks for the help, didn't realize that it was that simple to add thickness.

another way is by using a Cookie SOP.
let's say you have 2 polygonal boxes, which intersect.
you can carve out a ‘tub’ by subtracting one box from the other.

Hi,

To have the Thicken SOP you must install the Game Dev Tools.

https://www.sidefx.com/tutorials/game-dev-toolset-installation/ [www.sidefx.com]