Rocksnotch

Hey, I was actually wondering something and maybe you can help? Like, when I try to make buildings, some tiles are still ?'s. All important tiles are fine, but everything except one railing in the railing section are ?'s. Do you know how to fix this? (Sorry if you can't answer/doesn't belong!)

Seems like there's an issue for the download.....seems to say it doesn't exist when I click download on PZ-mods