Hello! I have a few questions I'd like to ask you. I've placed a lot of maps in the game (around 2000), all of which are pure-colored maps used to wrap my buildings. When these maps are within my field of view, the game's fps drops significantly (to around 15 fps). However, if I turn away from the maps, the frame rate increases dramatically (to around 100 fps). This suggests that the low frame rate is caused by the rendering of a large number of maps. I was wondering if there's a way to modify the rendering logic for maps, so that they can be rendered like regular blocks?

I'm not very familiar with Minecraft mod development, so I'm not sure if this is possible to achieve. Do you have any suggestions? Thank you!

Theoretically yes, but very hard to do and even harder without breaking vanilla compatibility.
It's not something I would attempt. I currently don't even have the energy to make this mod work on the current MC version.