Brickouz 3 Posted March 25, 2017 Hello! In this Masterclass, at 41:00, the teacher explains that fracture parts of the object can be localy modified using an attribute. So my question is about this : how do you control what part of the object will fracture? is there a way to connect the FEM solver to a voronoi attribute or anything like that? Thank you for your time! Share this post Link to post Share on other sites
ParticleSkull 83 Posted March 30, 2017 Hey Brickouz, there's a "Fractured Solid Object" button on the shelf tool, it should work work on a single click 1 Share this post Link to post Share on other sites
bifrost 9 Posted March 31, 2017 (edited) Yes! You can use the voronoi fracture node. After you are done fracturing with voronoi, drop down the connectivity sop and rename class to "fracturepart" on prims. Done! Make sure you still use the solid embed node to convert everything to tetras. Solid fracture is based on a random seed value based on the point position noise which isn't very controllable, as you mentioned. -bf Edited March 31, 2017 by bifrost 3 Share this post Link to post Share on other sites
Brickouz 3 Posted April 5, 2017 This is perfect! Thank you Share this post Link to post Share on other sites
mavencolby 1 Posted April 21, 2017 Hi! So I'm driving the fractures on my FEM object by at attribute - that that's working nicely. However, and this may be an inherent problem with FEM right now, but I'm getting enormous stretching artifacts when I have fracture enabled. It seems to appear somewhat randomly, but it may be due to the collisions and not enough substeps. I'll post a video when I'm at my workstation. Has anyone encountered this? I really am unsure how to tackle this problem without waiting days for the simulation to run through a million substeps. Thanks! Colby Share this post Link to post Share on other sites
mavencolby 1 Posted April 21, 2017 Hello! Attached is a couple flipbooks showcasing this problem. Hopefully I can resolve this issue soon. Vimeo | FEM Problem Share this post Link to post Share on other sites
mavencolby 1 Posted April 22, 2017 (edited) So it seems to be completely broken. FEM freaks out and stretches the tets, no matter what I do. I tried simplifying the collision geo to just a sphere, and the collisions still seemed to be causing a problem. Oh well, I guess secondary fractures won't work yet. I'll just emit particles! Which is fine, but I'm a little disappointed. I'll post a scene when I'm back on my workstation. Edited April 22, 2017 by mavencolby Forgot something! Share this post Link to post Share on other sites
