I made a big ol' mesh in Blender, and then decided that I should apply different textures to different parts of it in Unity. I went back to Blender and used "Split" to create (I thought!) submeshes. However, when Unity reimports the .blend file, there is still only one object and one mesh listed in the Project hierarchy, and I can't texture them separately. Am I skipping something obvious, or is there some other piece of the puzzle I'm missing on the Blender side?