Hello! I'm confused with the naming convention of some of the files.
For example with walls, I've attached an image with 'Wall B1_S' on the left and 'Wall B16_W' on the right. Assuming that the last letters in the names refer to the cardinal directions South & West, shouldn't those images both end in either S or W?

If you put 'Wall B1_S' and 'Wall B16_S' next to each other, they can't be continuous.

Or I don't understand the naming convention and how they're supposed to be placed.
Thanks!