This is insanely cool! Thank you, ulia!

This is really interesting. This is exactly what I need in VR. Thank you.

Yeah you can do that pretty easily with some scripting by having the two camera as separate objects and positioned with the script, but this would make it less self contained due to the potential issues with instantiation and missing the references for the camera and render textures, putting it at risk of breaking. A custom shader can probably do some nifty things also and should be slightly more reliable.

Cool idea. I wonder if it would be possible to create a more realistic effect where the magnification becomes less when going very close to the object and increase when rising, then become less again at a distance.