UV Mapping not working in Unity

So I made a model within Blender, and attempted to UV map a texture to it, but upon exporting as a FBX, it shows up in Unity as just a white model with no color or texture. I applied two materials to different parts of the model, and UV Mapped it to the textures used in those materials, and changing the mapping does have an effect on what appears when I render it, but for some reason, when I import it into Unity, it will just show up white. Is there something I have to do in order to make the textures show up in Unity?
What’s really annoying is that I did the same thing on another model(as far as I can remember at least) and it’s textures load fine in Unity, but this one just doesn’t.