Only half of the object is getting texture, the other half is dark I have a cube and I want to apply a concrete texture to the inside of it but, when i do, it only applies the texture to half of it on the inside and then the other half on the outside of the cube. Why?
Incorrect, corrected after the first image

The issue is with your material's bump node. Change it to a Normal Map and everything works fine.

I don't know why the Bump node doesn't like hollow shapes, but every replica mesh I created and plugged into the material always ended up with those black surfaces. When I unplugged that Bump node, the problem went away.



Edit:

Seems like I finally found the source at the same time as HelloHiHola. You probably meant to plug in your normal image into the Strength input, not the Normal input.