I have weirdness happening baking normal maps from sculpted meshes in Cycles. It's treating some outward facing edges as crevices for some reason.
Attached pic shows a banged up spike. I duplicated the model and Remeshed it to get a good sculpting base. From there I baked the normals in the usual way. You can see all the hard corners of the spike are depressions or crevices now.
Any idea why? I recalculated the normals, and this seems to happen where hard edges were on the low-poly model. I don't understand where the problem could be happening.