sonppw Posted April 9, 2014 Share Posted April 9, 2014 (edited) hello ! i want to know about gas build collision mask node i already knew that created collision, vel, index field where affector objects overlap with the fluid field my hip file is being unoverlap anything and box set to affector object but hip file is ignore affector object overlaping with the fluid field also create collision field(SDF) by fullsize i guess i don't understand it or error? collisionmask.hipnc Edited April 9, 2014 by sonppw Quote Link to comment Share on other sites More sharing options...
sonppw Posted April 9, 2014 Author Share Posted April 9, 2014 i can solve problem turn on invert iso in scalar field visualization but why i should turn on it? accroding help file collision field created by Each voxel of this field is the distance to the closest affector object. If it is inside an affector object, it is the negative distance to the surface. so in my head is affector object inside value is negative that represent SDF why i should turn on invert iso?? Quote Link to comment Share on other sites More sharing options...
gosch Posted April 9, 2014 Share Posted April 9, 2014 There is no error here, historically collision field equals to inverted SDF. I also noticed that your box has negative Y size, this leads to incorrect behavior Quote Link to comment Share on other sites More sharing options...
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