wreath 4 Posted November 24, 2020 Hi everyone, I have a simple sample scene here, having problem with the flip collisions. - I have a basic deforming sphere geometry that has a colliding liquid which works fine. -Problem part it i also have some liquid pouring on top of that deforming geometry (needs to collide the outer side of the sphere) but seem like there is a square bounding box around the collision (due to negative sdf) geo which gives me unproper collision outside. How can i have correct collisions for both inside and outside of the deforming mesh? thanks. Flip_InvertedCollision_Problem.hiplc Share this post Link to post Share on other sites
dleonhardt 15 Posted November 24, 2020 As long as you don't need both liquids to interact with each other, it's probably easier to just do two separate simulations. One with the inverted SDF and one without. Share this post Link to post Share on other sites
wreath 4 Posted November 24, 2020 2 hours ago, dleonhardt said: As long as you don't need both liquids to interact with each other, it's probably easier to just do two separate simulations. One with the inverted SDF and one without. This is just the sample file/scenario so on the actual scene i have to simulate them together unfortunetely so need to know if it is possible in Houdini, thanks for the reply anyways Dennis. Share this post Link to post Share on other sites
Atom 1,193 Posted November 26, 2020 You can just use the deforming geometry tool twice on the same deforming geo source. Make one collider inverted. ap_Flip_InvertedCollision_Problem.hiplc Share this post Link to post Share on other sites