Xgen - How do you make a Guide curve collide with scalp mesh?


I’ve created a new description and set the options to Splines / Randomly across the surface / Placing and shaping Guides. When I use the “Sculpt guides” brush and I’m trying to do a slicked back hair style the guide curve goes inside the scalp geometry base that it’s grown from, how can I make it collide?

I know if I use an “Interactive Groom” method you just right click and check the box to collide with mesh…

(Rant) WHY within the same program/plugin, is this a separate option? And different sets of tools to do the same thing but are different for interactive groom splines vs description place-able guide curves… Xgen workflows are baffling, right up there with patch modeling.