Create object (not material) from image w. alpha channel

Does anyone know if this is possible in Blender too? And if so, how to do it?

Sculpt tools, add a feather texture to your brush
or use the texture with the displace modifier
Displace the feather mesh
Apply any dubdivision & displacement
Delete the unwanted faces

Thanks Richard, I tried it this morning, with a feather texture to the brush, and Dyntopo, it works ok… I’ll try it with the displacement mod. later…
but, and sorry if this is a stupid question, how do I change the brush hardness? All details are faided out at the edges, which makes for a pretty, but crappy object…