Can't texture just one side of the inside of a box

I have a box (hollowed cube) that I want to apply a different texture to each of the inside 4 faces. I know how to do this to the outside faces using the select texture button or just dragging the texture to the face. However this method does not work for the inside faces of a hollowed box. The whole insdie seems to be treated a one face and I can't just pick out one face. The same thing seems to apply to a hollowed out prism. Has anyone found a way to do this?

Unfortunately, that's the way it is. Insides of hollows, regardless of the particular shape, are only counted as one surface.

well, you could stitch your textures together into one big one, and use that.

As Lee said, make a 4-panel texture. That's the only way to do it. Hollows are always treated as a single face, regardless of their shape.

Thanks. I was afraid of that. I'll give that a try.

But note that the repeats on hollows act kinda strangely. You'd think that if the 4 faces of a hollowed box, for example, are considered one surface, that setting the repeats to 4 would result in exactly 1 tile per face, but it doesn't. You actually have to divide the desired repeats by the hollow percentage. So if it's a 75 hollow, divide 4 by .75, which gives you 5.333.

The offset center is also skewed, which is even more complex. To find the true center, multiply .5 by the hollow, then subtract .5, and multiply by the desired repeats. So again using a 75 hollow and 4 as repeats, ( .5 / .75 - .5 ) * 4 = .166