ugly, deformed, noisy, blurry, distorted, out of focus, bad anatomy, extra limbs, poorly drawn face, poorly drawn hands, missing fingers, nudity, nude Bright colors, metal textures, modern designs, plastic materials, non-Celtic patterns, rough or unfinished surfaces, light-colored wood, geometric shapes unrelated to Celtic art, visible screws or nails, glossy or reflective finish, painted wood, digital displays, LED lights