Absolutely devoid of jarring, mismatched color schemes, discordant composition or poorly executed lighting. No hint of an outdated, cliched design or overly simplistic and unimaginative renderings. The mockup must be free from any irregular or blurry textures, maintaining a clean, professional look. There should be no evidence of poorly integrated elements such as an out-of-place logo. The concept art should be far from cartoonish or unreal, avoiding any sign of artificial, harsh or flat lighting. No traces of inferior quality, low-resolution photography or unconvincing shadows and reflections. Certainly not resembling the works of any subpar or amateur artist. This creation must truly be a masterpiece, devoid of any aesthetic missteps or oversights., cartoon, 3d, disfigured, bad art, deformed, poorly drawn, extra limbs, close up, b&w, weird colors, blurry, watermark