Unity rendertexture only renders a solid color

Question

I'm making a game in Unity 2019.1.6f1 PC, Mac, Linux standalone. I want to project the game unto the pages of a book and believe that render textures can help achieve this. They worked reasonably well on the placeholder book model, but when I try to apply the same render texture on a different model, it only seems to project a blown-out single pixel.

Here I placed them close to eachother to show the problem:

I made screenshots of all the settings that may be related, though I did try to change all of them already. If any other information is necessary, please let me know.

The camera settings

The material settings

The mesh renderer settings

The texture settings I tried changing the size variables to powers of 2, but that didn't work either.

I also found this post, but I don't believe this is the same problem.