It would be nice to be able to change how buttons look with resource packs :)

Additional context
These buttons:

Hello. The mod uses a completely different UI system where widgets buttons are actually scalable and flexible (their size can change to anything), unlike in Vanilla where buttons and other widgets can only be 20px in height. Because of this, I had to create my own textures for the UVs instead of using the Vanilla ones. I was however, thinking of swapping the textures for those two buttons back to Vanilla textures as those buttons are 20px in height anyways.

Changing the textures of those two buttons is possible. The textures belong to TCDCommons. Just download them from the linked assets folder, and make a resource pack out of that. Another place you can find the default textures is in the jar file. Just download any TCDCommons jar file, and open it as a zip. You should find the assets folder in there.

That's exactly what I wanted to do, thank you 👍