I'm creating some assets for a game I'm making using Medium by Oculus, but when I import it into Blender it leaves me with strange lighting artifacts. I tried dissolving some vertices and edges to try and fix them but it would usually cause them to move a little bit. https://imgur.com/a/K4i0jrZ
This is an exported .obj of the sculpt with 10% of the polygons. If I do a 100% export (half a million polygons) the lighting artifacts aren't there until I decimate again in Blender. Also I'd like to figure out how to Make the edges harder and straighter, since that's how they were in the sculpt.