I was looking for a way to mark/group edges and make them hard in terms of smoothing and this is what I came up with:

I couldn't find a standard way to do this. Maybe an edge option in the Normal node would be cool.
Cheers
Pacman972Hello @Pacman972, I think you miss the @probiner response that give you the straigth way to do this without litteraly cut the geo.
The issue with the solution provided with Cusp : you litteraly cut the geometry and it gives overlapping points...
I'm surprised Houdini does not provide simple tool to crease/hard edge as you can do with other software like Max.