I'm in the process of making a very very VERY LARGE SET of wallpapers for Halloween.  It will have (ALL FULLY coordinating of course) walls with tile, some paint, some with the ghosts & pumpkins pattern aka WALLPAPER, & some with a bit of more than 1.  I've got a definite group of 6 colors with a possible 7th all with festive spook-tacular Halloween names. :D  I myself when I have downloaded walls from people REALLY LIKE having a choice so I can make different combinations with the same "set".

I often find myself using CFE cheats when I build (ConstrainFloorElevation) to make attached garages & things like that.......it does however make 2 triangular walls where the 2 levels meet that would normally just be a single rectangle......THIS is one of my main motivations for wanting to make walls sets that also can work around THIS cheat & still look AOK.  I've been hard at work.....the TRICK is to be to get them ALL DONE in time to be published for YOUR Halloween TREAT. :D

Sorry I couldn't figure out how to attache a pic.....or I'd have given everyone a "sample" to see what it is I'm up to.