Once you start playing with plastic and a polarizing filter, you just keep trying new items to see what they might look like. I liked the face-like quality of this odd bit of plastic.
@30pics4jackiesdiamond I used a white screen on the laptop (a youtube video of white that just ran for 30 minutes or so) with a polarizing filter on my lens. I had to use fairly flat plastic ... tape dispensers work great, as do clear plastic utensils. As it was once explained to me by Liz Hammond who used to post on 365, "You will get the black background if you turn the moving bit of a circular polarizing filter 90 degrees to when the back ground is white. So polarised light means that all the light waves are travelling in the same plane - this is what your screen emits. Your polarising filter will only let through light waves travelling in one plane too. When it is white the planes of the light waves from the screen and the planes of the polarising filter on your lens are lined up (so the light comes through). When it is dark this is because the filter is at right angles to the light waves from the screen and no light gets through the filter. The see through plastic though distorts the planes of the light waves from the screen and so some of it will get though to the filter and dependant on the stresses in the plastic different light frequencies get more or less distorted, so you see the spectrum of colours in the plastic. Great to hear from you, sorry it took so long for me to see it!"
Here's an article that might help: https://digital-photography-school.com/make-funky-images-plastic-objects-polarizing-filter/
It's surprisingly fun and simple as long as you have the polarizing filter.