Watermark, signature, words, text, logo, unrelated characters or objects, abstract elements, overly dark or dull colors, low-resolution, overly simplistic design, excessive negative space, heavy use of black and white, tight brushstrokes, rigid lines, modern architecture, dystopian or futuristic elements, technology, urban settings, violence, nudity, nsfw. flat design or composition, pen and ink, clumps of the same types of flowers