Frequent causes of problems with Rhino:
- Mesh settings - too coarse a display/render mesh causes jagged edges, gaps between edges, faceted surfaces and other visual problems
- Distance from the origin - too far from the origin causes a variety of problems involving both geometry and appearance. Frequently the cause of erratic or strange behavior.
- Inappropriate absolute tolerance - Generally shows up when there are problems with joining, splitting, trimming or intersecting.
Other candidates for the list?