I mean this one, not the custom sculpty one.
I thought it was supposed to be a replacement for the weird current workflow with creasing but I can’t get it to work. I have a mesh without subdivisions, I use the crease curve and instead of creating a creased edge it distorts my mesh in all sorts of weird ways.
Brushes and tools will only move and/or modify current vertices (points). This means if you don’t have a lot of points in your model and no sub-division levels then some brushes won’t act the way you would expect them to as they would on a high polygon mesh.
That’s a picture from documentation illustrating the use of that crease brush. I’ve tried using it on a low-poly mesh like the one on the left and it just warped the model. The documentation also specifies that crease brush can only be used on meshes without subdivisions so I deleted all of them before attempting to use it.
Might help if you posted a screenshot.