Risograph stamp of A mighty oak tree, a tropical palm, a cat sitting on a windowsill, a wise owl with big round eyes, a fox in an autumn forest

risograph print postage stamp, overlapping semi-transparent neon colors, grainy ink texture, slight misregistration between color layers, bold flat graphic shapes, cream paper background, perforated serrated stamp edges, modern print aesthetic, fluorescent pink and blue ink, square format, stamp fills the entire image, NO padding outside stamp edges, NO background frame, ONLY the stamp visible. Subject: A mighty oak tree, a tropical palm, a cat sitting on a windowsill, a wise owl with big round eyes, a fox in an autumn forest. No text, no words, no letters, no numbers. The stamp fills the entire image with NO outer padding or frame - ONLY the stamp itself visible, NOTHING else.