With the vanilla bunker modules (the corridor pieces) the tiling works for the first few pieces, but after I place a few, all pieces to the left of some imaginary line are off horizontally by a few (5ish) pixels, making placement quite aggravating. Anyone know why this happens?

It has to do with the scene looping. It happens in all looping scenes at the seam.

This doesn't happen if the map creator makes the size of their map something divisible by 24.

damnit, tim beat me to it.
i wish editor scene was fixed like that, btw DRL.