When attempting to smooth stone walls the corner blocks are inaccessible from the inside, making it impossible to create a fully smoothed room without destroying a block and replacing it with a wall block.
Two related suggestion: It would be nice if the stone walls had a more similar texture to smoothed walls to prevent patchwork-like walls. It's virtually impossible to dig a base and not end up filling in walls here and there. Also it would be helpful to have a 'smooth' option with a hotkey appear when a rough wall is selected, in the actions menu next to 'mine'.
Two related suggestion: It would be nice if the stone walls had a more similar texture to smoothed walls to prevent patchwork-like walls. It's virtually impossible to dig a base and not end up filling in walls here and there. Also it would be helpful to have a 'smooth' option with a hotkey appear when a rough wall is selected, in the actions menu next to 'mine'.