Hello friends:
We are trying to set up a dynamic system for urine filling the bladder, and after messing with nDynamics during some weeks, we have started to try to solve it on Bifrost.
After much trial and error, we finally got the collider working, but many particles are leaking outside 
We tried increasing the thickness, as well as using a Shell type, but to no avail.
Could anyone check out the scenes I’m adding to this post? Contain both my scenes for urine dynamics, in Bifrost, and with the regular Maya system. Bifrost seems much more accurate, but at this point, we don’t really care much which system we will use, as long as it doesn’t leak that much 
http://www.filedropper.com/bladderdynamics
Excuse the semi-disgusting post, and thanks a lot in advance guys.