For a while now, maps have been incapable of registering certain types of blocks such as slabs/stairs etc. It'd just render them gray and such. Maps need a major update to allow for them to ..well properly do their job. Stuff like this pathway etc shouldn't really be ALL gray and some builds deserve their true colours Stone slabs should be allocated ID 22. For example. Revamp?

http://gyazo.com/9a1782c65fd8c96584cefdfcb34e8bde