Smooth sandstone's bottom texture is that of ordinary sandstone
The bottom face of smooth sandstone, which previously (in at least some 0.14 versions - don't recall exactly which) was smooth like the top, has the cracked pattern of the bottom of 'standard' sandstone. Ceilings made of smooth sandstone subsequently have drastically altered patterns from the intended design.
Attached screenshot shows regular sandstone on the left, smooth sandstone on the right.
Created Issue:
Smooth sandstone's bottom texture is that of ordinary sandstone
The bottom face of smooth sandstone, which previously (in at least some 0.14 versions - don't recall exactly which) was smooth like the top, has the cracked pattern of the bottom of 'standard' sandstone. Ceilings made of smooth sandstone subsequently have drastically altered patterns from the intended design.
Attached screenshot shows regular sandstone on the left, smooth sandstone on the right.
Partially fixed in 1.0.4.0:
- Chiselled and Smooth sandstone now have smooth underside
Still need attention:
- Red Sandstone: Chiselled and Smooth still have textured underside.
- Sandstone slabs still have a smooth underside (Red and Normal)



it works fine with me, maybe it is because your graphics are set to "fast".
I don't appear to have any setting under graphics that can be set to 'fast', and toggling the settings I do have doesn't fix it. Perhaps it's a platform difference since I'm using Windows 10?
Confirmed.
I've attached a couple of pictures showing the difference between PC (java) and Pocket edition.
Interestingly also, slabs have a smooth texture underneath when the PC version doesn't.
Pocket:
PC:
Created new tickets for the other blocks:
MCPE-20005MCPE-20006