Looking for advice on .stl export for object with flat curves

 From:  Rick (ELDRICK)
6672.8 In reply to 6672.5 
I don't have pix, as I toss the not-so-good prints, but the issues appear in a couple of areas.

- Until I put a small flat on it, the "peak" of the flattest side had an area about 6mm that was all rough and lumpy. It's where there was a couple of hundred triangles all coming to one point. there's a name for this issue, although I can't recall it.

- Sometimes I get 10mm long narrow indented valleys that run from the juncture of the round barrel at the bottom and the "egg" toward the center of the flattest curve.

- I've also seen a 4mm wide patch of rough surface running up to the lower center of the flattest curve.

- Other times there are fairly obvious oval rings around the center of the flattest curve.

Bottom line is that MOI feeding a slicer seems to do a mediocre job when you crank up the resolution on the .stl. I've seen the same issue using Cura and Kisslicer.