This is a linear blend result from 1 guide input to a hairgen.
The blending method itself is hardcoded inside hairgencore node, So I guess I can't create a custom blending method (?) However I was wondering if anybody has figured out how to overwrite/create extra control for this flatness effect?

purple circles are for visuals only. Was thinking if there could be a way to control this on the generated curves (hair) themselves (there should be, its houdini after all) what attributes am I suppose to be manipulating here? orientation? twist?