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PAR Anamorphic
Added the ability to use non-square pixel aspect ratio. This is to maximize the resolution for aspect ratios that are not the same as the HDMI monitor.
In the added section under hardware constants. The user can input two floats, x:y. These are then used to squeeze or squash the image that gets rendered on the hdmi screen. In post you can then unsqueeze the image to restore proper proportions of the contents at the desired aspect ratio and resolution.
Assuming the screen is using 1920x1080 square pixels. That's normally an aspect ratio of 16:9 or 1.78:1. If you use a PAR of 4:3, or 1.33:1. The image will be squished horizontally 1.33x. A perfect circle ends up being a slightly slimmer oval. After exposure. In post, you then unsqueeze the image by the same amount and the ellipse goes back to being a perfect circle and the whole monitor stretches to accommodate an exposed image of roughly 21:9 or 2.37:1 cinemascope. The upshot here is that you get to use all the pixels of the monitor for this. Just like you get to use the full height of a 4 perf negative when using anamorphic glass.
The squeeze can be done the other way as well. Squeezing more height into the 16:9 screen. The perfect circle would then be seen as a squat oval. For example. If you use a PAR of 1:1.25. After unsqueezing the result. The monitor area would be closer to 1.43:1 aka 15 perf IMAX ratio.
Of course. You still have to crop out what's outside the monitors image.
In terms of real world optics. The whole physical VOP contraption ends up being the taking lens. And the anamorphic adapter is in the 3D rendering.
As this is done in the 3D world without glass. If you keep the monitor in focus with the Pi Camera's lens and no extra optical filters. You wouldn't get any "fun" artefacts from this method. If you deliberately defocus the lens. You get
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