Section - The ceiling
The petter-ceiling is a backdrop. Every petter-room contains the petter-ceiling. The printed name of the petter-ceiling is "ceiling". Understand "ceiling/sky/dome/crown" or "crown of leaves" as the petter-ceiling. The description of petter-ceiling is "[if location is MGR3e]Through the dirty glass ceiling you see the sky outside. It is a bright, sunny day and the sky is blue with little puffy white clouds[otherwise]The ceiling of the greenhouse dome is hidden behind the dark green crown of the tree[end if]."
Understand "puffy/white/clouds" as the petter-ceiling when the location is MGR3e.
Instead of taking the petter-ceiling:
say "Even if you could reach it, it would hardly be portable."
Instead of throwing something at the petter-ceiling when the location is not MGR3e:
say "The ceiling is too high to hit with [the noun]."
Instead of petter-looking behind or searching the petter-ceiling when the location is a petter-room:
try examining the petter-ceiling.
Instead of doing something to the petter-ceiling when the action requires a touchable noun:
say "It is [if the location is MGR3e]still [end if]too far away."
Instead of attacking or cutting the petter-ceiling:
say "Even if you were strong enough to break the glass, you would probably cut yourself badly on the shards."