edge detect from normalmap/height map (edge/cavity/pointiness/curvature)

If blender can generate edge and curvature from normal map and controlling it with a render node would be awesome. (edge or cavity or pontiness or curvature map: it is very similar method ) And use this as paint stencil mask or just use for mix other render node for render output . Why? Many time when i see realistic look creature/object it is very important to use this feature. And why need convert it from normal map? Because it is much much-much faster and don't need use actual geometry (lot of geometry need lot of memory and computing). so you can see the result in real-time with i.e. with EEVEE and you can painting with stencil mask or modifying it with render node.

Usage

1. bake normal map/height map form high polygon and use this edge/curvatrue detect from normal map/height map and later you can use for stencil mask or for material node.

link for mari 3d texture painter doc for how use it:

edge detect from normal map: campi3d.com/External/MariExtensionPack/userGuide21/MARI%20Extension%20Pack.html