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Obj merging hair: should it work? Aug. 18, 2021, 11:21 a.m.

Hi, when rendering hair using Redshift, I would avoid merging hair with a "head" because Render Polygons as Hair will usually try to render the "head" as hair. The different look you can see could be caused by this or the hair width/thickness which Houdini and Redshift treat differently. ie. Houdini = radius, Redshift = width/diameter (or visa versa, I can't remember). This is what Match Houdini/Mantra Hair Thickness is for.

Thanks Rob. I should have been clearer; I'm merging the hair and head objects in two separate objects, so no hair and head mixing. I'm beginning to think that some redshift attributes get left behind when merging the hair. The individual hair objects render fine WITHOUT the render-polygons-as hair ticked and the merged hair object renders as expected in Mantra. I may be missing something but I think it's an un-catered for Redshift scenario.

Obj merging hair: should it work? Aug. 17, 2021, 3:11 a.m.

"merged_hair" renders fine for me if I enable "Render Polygons as Hair" in its Redshift OBJ properties. My guess is that Redshift treats Hair Generate nodes differently, and for the rest we need to tick that parameter.

Thanks pabcou. As you can see from my original post I mention getting the hair to render by ticking "Render Polygons as Hair" but as you can see from the included image it's very different in look from the the contributing single hair objects.

Obj merging hair: should it work? Aug. 15, 2021, 6:43 a.m.

Interestingly the simple scene above works as expected in Mantra. So it looks like some sort of Redshift issue, or at the least the operation of redshift issue.