Blender to Unity - Normals/Lighting

I am modeling walls in Blender to use in Unity in a modular way. The textures tile seamlessly, but if you look at the walls from any angle other than straight-on, the far corner darkens and the divisions between wall segments become obvious. Is there a way to get rid of this effect?

8370-normals.png
8371-normals2.png

I changed the Normals option in the import settings from Import to calculate and that fixed it.

8372-normals3.png