I've been a user since S3D came out. From time to time I get quality issues that show up in the preview. No matter what I do, I cannot resolve the issue...and I wind up using something else like Cura. Factory file attached.
The geometry is good. STL exported out of Rhino from clean NURBS objects. I've also ran it through Geomagic looking for mesh defects and there are none.
The holes appear oval, there are gaps in the perimeters (both inside and out) and the quality is subpar.
Anyone have any ideas?