norwegian nature: a vintage poster of a river and mountain painting

painting river mountain dan mumford norwegian nature warm color palettes vintage poster design detailed background elements armand guillaumin paint dripping technique art landscape scenic mountainscape norway artistic style retro artwork scenery natureinspired colorful impressionism expressionism inspiration composition details interpretation nature: vintage-style featuring ocean trees mountains background showcases vibrant orange amber hues creating captivating visual experience resolution painting's intricate unique add depth texture whistlerian-inspired generated