textures - Can you apply "roughness" to a piece of a mesh? -


so i've used program cloudcompare , implementation of poisson surface reconstruction algorithm create water-tight mesh. there no problems mesh, want areas filled in using poisson appear equally "rough" rest of mesh. due nature of algorithm, mesh created fill in holes smooth, making unnatural when compared area next had points. there way somehow grab "feel" or "roughness" of surrounding area , apply on areas generated? i've looked displacement maps , normal maps, i've found pertains overlaying map high-res model onto low-res model.


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