Using the HIDEPRECISION to increase the Quality of a Hidden or Shaded view
*Applies to: AutoCAD R14, 2000, 2000i, 2002, 2004 and 2005*

With AutoCAD R14 came the introduction a new system variable that controlled how AutoCAD calculated hidden line and shaded views.  This variable was called HIDEPRECISION and had a value of 0 by default or 1.  By setting HIDEPRECISION to the value of 1 it takes AutoCAD longer to generate the view because more memory is needed, but it is able to hide all objects to produce a more accurate output.

0 -	Single precision, uses less memory and takes  less time
1 -	Double precision, uses more memory and takes additional time to complete

Command Line: Command: hideprecision New value for HIDEPRECISION <0>: 1 Related Commands: HIDE and SHADE