RickToxik Posted March 11, 2015 Share Posted March 11, 2015 Hi, I have a keyed gravity that affects a FLIP simulation (a box of water..), and I am trying to find how I can offset my gravity force to start with top particles down to bottom. Ideally I would have an animated box that would trigger the gravity effects on the particles... After a lot of research, it seems that I need to use the mask slot of the gravity but can't figure out more than that, as I don't see in the viewport any feedback for the scalar field and vector field. Help? Thank you!!! Quote Link to comment Share on other sites More sharing options...
Diego A Grimaldi Posted March 11, 2015 Share Posted March 11, 2015 You can perhaps group the particles you need to apply gravity to? Quote Link to comment Share on other sites More sharing options...
pbarua Posted March 12, 2015 Share Posted March 12, 2015 Go to FLIP Solver > Particle Motion : turn off Apply External Forces And wire POP Force to second input (Particle Velocity) set Force to -9.8 on Y-axis or whatever you like. This way external forces will not affect your flip sim. Quote Link to comment Share on other sites More sharing options...
RickToxik Posted March 12, 2015 Author Share Posted March 12, 2015 (edited) Hi, thank you both very much for your help. I was able to make it work with a mix of your solutions. The Pop Force in the velocity of the Flip Solver is working very good. I attach the working scene if somebody else wants to see the setup. I was never able to read the particle group in the Gravity solver like you suggested Diego, do you have more tips for that?... I write the group in the gravity, the group exists but it seems to be just on or off, no animation possible. p.s. Also a tutorial here for grouping particles, around 7:30: FLIP_Gravity_Field.hip Edited March 12, 2015 by RickToxik Quote Link to comment Share on other sites More sharing options...
pbarua Posted March 12, 2015 Share Posted March 12, 2015 I write the group in the gravity, the group exists but it seems to be just on or off, no animation possible. You have to use two gravity force DOP for that. Quote Link to comment Share on other sites More sharing options...
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