the textures on these dont line up nicely with each other. L shape walls seem to be starting at the wrong point, making them unable to centre nicely. and on wall U shape the "end side" seems off totally (screenshot 3 shows the correct lining up on the ends side of double walls) to replicate: make a hallway with these blocks and try to apply textures
Not sure if this is really fixable, because where do you expect the L-shaped texture to start and stretch? If you scale it down it might not fit to other blocks then. Never the less > maybe you can mark in the screenshot where the cut/strech should go or where the orientation should go. Thx
I would suggest no stretching on these at all. that will always end up in alignment issues. added a screenshot with a thin wall as reference.. since they are the same size as full blocks / no stretching the textures will have to be overlapped by the red lined section / be tucked under there. it should look the same as when you add a thin wall to a full block. (screenshot 2)
stretching is also an issue on other blocks btw. also some blocks textures are aligned on different axis, making it impossible to ever align them.