McNistor Posted October 25, 2019 Share Posted October 25, 2019 Howdy, Dealing with a problem I tried to solve for a whole day, procedurally. No luck so far. There are lots of hairgen strands that go inside the mesh and get some empty patches. The guides are OK, although pretty close to the skin mesh, as that's how I need them to be. Any idea what's causing this and more importantly how to fix it? I know it's a long shot without files, but unfortunately, I can't share the scene, one of the reasons being it's complex/many external files/ large disk footprint. Quote Link to comment Share on other sites More sharing options...
kiryha Posted October 25, 2019 Share Posted October 25, 2019 If guides are ok and not getting into the mesh than its probable hairs side. For example, Gude Proces (Frizz) may cause such a thing, so you may decrease the influence of such nodes at the root o the hairs. Quote Link to comment Share on other sites More sharing options...
McNistor Posted October 25, 2019 Author Share Posted October 25, 2019 (edited) @kiryha Yeah, I noticed Frizz will accentuate the problem (it would be cool if the hair process nodes were more accurate), but the issue here is that I have hairs inside the mesh (attached), even without a guideprocess active. Tried decreasing the voxel size too, but no luck with that either. BTW, the mesh is completely closed, no holes. Edited October 25, 2019 by McNistor Quote Link to comment Share on other sites More sharing options...
kiryha Posted October 25, 2019 Share Posted October 25, 2019 (edited) Interpolation between guides can be an issue as well. Do those penetrating hairs are far from the guide? The guide process nodes should take mesh into account as far as I know, at least in some cases, like "Set direction". Edited October 25, 2019 by kiryha Quote Link to comment Share on other sites More sharing options...
McNistor Posted October 25, 2019 Author Share Posted October 25, 2019 @kiryha No, those are render/gen-hairs. The 1st image below is how it looks from outside. The 2nd is with the guides themselves. This happens only in this region of the entire groom. Quote Link to comment Share on other sites More sharing options...
kiryha Posted October 25, 2019 Share Posted October 25, 2019 Ok, for me its looks like an interpolation issue, cos you have guides coming to one direction and guides comming to opposit direction close to them. So in between hairs are a bit confused about where should they grow to. If its the case there is a solution for such a case, I will try to recall what was it... 1 Quote Link to comment Share on other sites More sharing options...
McNistor Posted October 25, 2019 Author Share Posted October 25, 2019 @kiryha OK, I'll try lowering the max guide count for that region to see what will happen. Quote Link to comment Share on other sites More sharing options...
kiryha Posted October 25, 2019 Share Posted October 25, 2019 (edited) So if its the case of opposit oriented guides. You can draw the curve on the skin which would be a "divider" for hairs, and plug this curve in the last input of Guide Partition (place it after Guide Groom node) node. Edited October 25, 2019 by kiryha Quote Link to comment Share on other sites More sharing options...
McNistor Posted October 25, 2019 Author Share Posted October 25, 2019 @kiryha It works with lowering the max guide count locally. Hooray! If the guide-partition was not busted (at least for .391), that would've been the 1st thing I'd try. Anyway, thanks for throwing out the interpolation idea - it pushed me into the right direction. Quote Link to comment Share on other sites More sharing options...
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