Section dedicated to window covering techniques

[Mobilesport]

How about a section with only all of the different techniques to covering windows.
Different people could post there way of dong it.  ,, with pictures. 
Im looking for a new way.
Tradionlly I cut 1/4" plywood and then upholstered , sometimes putting foamboard for insulation  Inside of fabric.

 

[Raven+Squid]

For the windshield, driver and passenger side we use reflectix, back and side widows we will use small strong magnets to put up scarves. We've got a cargo van so it stays darker.