So, if you need to place baseboards where the wall gets thinner it is better to create a "loop".

This "trick" is also very useful to force the end of a stand-alone wall to have a single texture. The end of the wall will display half of each texture used on the sides. No problem if you are using the same texture on both sides but in most cases you want different textures on each side.

To have a single texture on the end of a wall draw a loop (like an extended U) with a wall half as thick as the original. Make sure both legs of the U touch and the resulting double wall is just as thick as the single previous wall. You know have 3 sides you can give a texture, one of which is the end of the wall. (4 sides if you use the same trick at the other end of the wall.)