Why are some hatch patterns displayed distorted?

Symptoms

Distorted display for hatches. This does not happen if the hatches are created near the origin.

Cause

Pattern definitions have inherent inaccuracies that cause them to distort for large coordinates. If you create the same hatch near the origin the problem does not occur. If you create the hatch near the origin and then move the hatch, the display remains correct.

This is not due to inaccuracies in how the program calculates. The problem is with the pattern definition itself.

Solution

Use another hatch pattern or use a UCS of which the origin is close to the location where you want to create the hatch. When you restore the WCS, the display of pattern is still correct.