Learning Glass Solutions discusses how to insert digital images with the use of 1) frosted glass, and 2) software. 15 minute discussion, 10 minute Q&A.
Do you have a specification for the frosted acrylic plexiglass? What thickness do you use? Do you have a preferred vendor? Are some frosting methods better than others? I bought on amazon a sheet of frosted plexiglass, 30" x 18", about 0.2" thick. It works pretty well, but it is frosted on both sides, unfortunately. By the way, the "clearbright" stuff mentioned in another comment looks pretty cool -- if anyone tries it on a lightboard, please follow up!
@Canis Africanis Compared to the glass, lights pens, etc. With PowerPoint as my background in zoom, a black background, and a black shirt things are going very well for my students and me.
Luxlabs.co has a transparent projection film utilizing recently developed technology out of MIT that could replace the frosted glass with a much more clear solution
Why didn't you just capture the screen and use multiple monitors. You can modify the scale of what is displayed in OBS. This seems way more complicated than necessary... Maybe I am missing something?
