The exterior north and west walls are very.... tricky. I'm still attempting to do them and not having much luck.
The interior north and west walls can be done - but you need to use a goza. That's all the hint I'll give there.
Insofar as the maximum limit, there is discussion and from @Kyronix that the limit is 70-z... that means 70 tiles up from 0 on the Z axis. Anything higher and it could be removed.
Basically, these new craftable walls and floors are NOT affected by the circle of transparency test - they act like rubble deco and can essentially cause blockage. Keep that in mind when building.
FrejaSP got it right, I just got a bit more technical.
The interior north and west walls can be done - but you need to use a goza. That's all the hint I'll give there.
Insofar as the maximum limit, there is discussion and from @Kyronix that the limit is 70-z... that means 70 tiles up from 0 on the Z axis. Anything higher and it could be removed.
Basically, these new craftable walls and floors are NOT affected by the circle of transparency test - they act like rubble deco and can essentially cause blockage. Keep that in mind when building.
FrejaSP got it right, I just got a bit more technical.