This is a greybox project, so we shouldn't take in account detail or sustainability. Just something that will "work".
I have several objects that share one UV map and one material. I used Smart UV project for all of them so that it would pack them in the same space. I made a new image and applied it to the material.
I can texture paint each object just fine. However, I need to paint across all of them at the same time, in the 3D viewport (not the image editor). As it is, I need to select each object, then go to Texture paint and I can see my previous strokes, but I need to see them all at the same time (I'm making relationship lines etc). How to do this?
Also, my texture doesn't appear at all in material mode, although I have connected the texture to the diffuse channel.