Exported EPS from Tecplot has mysterious white lines in it

Problem:

I exported an EPS file from Tecplot 360 and when I viewed that file in Ghostscript, or converted it into PDF and then opened it in Adobe reader, it had mysterious white grid lines in it.  How can I make those white lines go away?

Solution:

The white grid lines are the result of the default display settings in Ghostscript and Adobe.   For both applications, changing one display setting will make the white lines go away.

For Ghostscript:

Go to Media / Display Settings and set the Graphics Alpha to 1.  The default is 4.

For Adobe Reader:

Go to Edit / Preferences.  Click on Page Display (in the top part of the list at the left side of the page) and then in the Rendering section uncheck the box marked “Smooth Line Art” and click OK.