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by baseethrowaway 2986 days ago
The information does not start out in fewer bytes. It starts out in all the bytes that represent the 3D models of entities you're interacting with in your game and the textures to cover them, at least. That's usually more bytes than needed to show a 32 bit 4K picture. The rendering process reduces all the jungle you have in your VRAM to a few kB that are briefly shown on your screen.

It seems like you don't know the basics of 3D graphics nor the basics of video encoding. It is extra work and would save some bandwidth needed to pump the picture to the display, which is not an issue in 3D graphics (we have dedicated cables).