Thorn has added a few things to the cowiverse for your enjoyment.
A material called spookyforest. Set this on an object within a thickly wooded location for an added bit of ambiance.
create some spooky trees. material them as _spookyforest_
A new command called setzone. This allows you to mark a number of connected rooms with a zone name. Also use it to designate the same zone name to creatures that you want to roam around in the area, and script them to use the roam command. They will only choose exits that lead to locations matching their zone name.
setzone jungle. create a monkey. setzone it to jungle
(Of course, that means Thorn has fiddled with Wolis' roam command, who might adjust it as he wishes.)
For more information:
read the material called spookyforest
read the command called setzone
read the material called zone