Solution: This is a display accuracy issue, which is controlled by the VIEWRES system variable. VIEWRES controls the number (1 to 20000) of line segments used to display arcs, circles and ellipses, which in turn controls how smooth a curved solid displays in the drawing window. A lower setting for VIEWRES improves zoom and regeneration performance at the expense of display accuracy. You can set VIEWRES in the Options dialog box:
– From the Tools menu, choose Options.
– In the Options dialog box, choose the Display tab.
– In the Display resolution section, enter a new value in the field for Arc and circle smoothness (valid range is 1 to 20000).
– Choose OK to close the Options dialog box.