If you constantly use the "TestZBiasFactor"

2023-12-07_Disc.3dm (932.7 KB)

This is a simple disc diameter = 1000, center at 0,0.
In Monochrome and Artistic the view is not good:

TestZBiasFactor = 8 is better.

Same for this model (Sweep2 from tutorial files):

Is better with TestZBiasFactor = 64.

And in V7 it is acceptable without fiddling with TestZBiasFactor:

If you constantly use the "TestZBiasFactor" command to fix display artifacts, please send a sample model to 
McNeel technical support so we can fix Rhino and get rid of this test obscure command.


OOBE for V8 could be better…