Houdini groom/hair some issue

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Hello here !

I've some probleme with groom/hair in Houdini:

I share some screenshot in this post > we can see my guide who part in different direction, but my hair generate do a weird interpolation. I've try to play with different slider like "influence radius / decay and max count but nothing fix that.

Houdini keep the influence radius value and generate a random interpolation betwin two guide apparently ... i've try to export my guide and test that in maya Xgen, and my guide work really good .. so .. any solution ?

In more with Houdini 19 you have delete the "recache stroke" of the guide groom, it is not nice for me !

Help pls !

Attachments:
pert.jpg (88.5 KB)
pert02.jpg (99.1 KB)
pert03.gif (755.8 KB)
guide01.jpg (116.0 KB)
hair01.jpg (86.8 KB)
hair02.jpg (76.3 KB)

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To avoid this kind of interpolation, you can define "parting" guides that literally draw a line between the two sections of the hair, using a Guide Partition SOP [www.sidefx.com]. These special guides tell the hair generation system to treat the two sides of each guide as separate "zones" for hair generation. You can also set a radius and strength on the parting curves, or even on the individual points in a parting curve, to vary their effect.

Here's an example from a groom I'm working on myself, where I use parting curves (shown in white) to divide the guides into separate zones and avoid interpolated hairs falling inside the head. (It's the same thing you can do with a region map in Xgen, but in my opinion, the Houdini approach is more flexible.)

Dave.

Attachments:
PartitionGuides.jpg (465.8 KB)

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Hi d2h !

I've try to use the guide partition, but he dont work, when i create a curve nothing it's happening, he create me a group but when i try to put the new group in a bend guide no change are visible.

Anything else i see sometimes the hair gen dont be affected by the guide

Attachments:
no_affected.JPG (141.1 KB)

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