This is my retroarch overlay that simulate crt flat sony trinitron monitor on widescreen 16:10 monitor.
settings in retroarch: integer scale off, viewport x 258, viewport y 88, viewport width 1164, viewport height 873.
samsung crt flat tv overlay
Here is my final old tv overlay with correct aspect ratio not stretched
settings in retroarch: integer scale off, viewport x 205, viewport y 156, viewport width 1000, viewport height 750.
This is my second version of the same overlay with added effects
retroarch settings: integer scale off, viewport x 198, viewport y 139, viewport width 1020, viewport height 785.
here is tv overlay with glass effects
here is old tv with glass effects