I was wondering about how this could affect gameplay. Like disguising your buildings by looking like other buildings.. That example of all the buildings being made of books. How can I tell the difference between a barracks and an archery range.. or just a patch of empty grass? I used to play a text based MUD that had a high level spell that let you create illusion spells that just output text of your choosing onto other players screens. It was often used to just verbatim send the You Died, text and ruin peoples day for a moment.