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You could try this and use an in-house model (developed for VR). It's free.
https://towardsdatascience.com/deep-learning-based-super-resolution-with-opencv-4fd736678066
The difficulty would be training it for your needs. But you have a fantastic library to draw textures from!
You know what you could also do... Ask Meta. Of course, they are really creepy to deal with, and they say they HATE porn (because secretly they just LOVE it)... But if you claim to be a researcher you could probably get help and ideas...