Stone walls for your haunted castle may be hard to come by but if you’ve got some time and some plywood you can create your own.  The Bronson Boneyard has a tutorial that shows how to create a stone wall facade using monster mud applied onto plywood. You’ll start by painting the plywood black, and then applying masking tape where you would like the mortar joints. Then, you’ll apply a thick coat of monster mud to the entire sheet, and then remove the masking tape. The great thing about this method is that once the monster mud starts to dry it lightens up, which eliminates the need to paint the mortar joints, and it also begins to crack slightly, which gives it a realistic stone appearance.   Items needed to complete this include: Plywood (4′ x 8′ sheets) Black paint Masking tape Monster mud Shop These Materials on Amazon USG Sheetrock Drywall Joint Compound 4.5 Gallon Cheesecloth Unbleached 36×36" (for Monster Mud draping) Affiliate Disclosure: HauntersList.com is a participant in the Amazon Services LLC Associates Program. As an Amazon Associate we earn from qualifying purchases at no extra cost to...