The Joker Painting, by Laercio Soares

This is a "fully painted" piece, but it likely uses a combination of materials to achieve those textures:
• Acrylics or Gouache: The skin tones and the suit have the opaque, layered look of water-based paints. The smooth blending on the face is a hallmark of acrylic technique.
• Inks: The "HA HA HA" text in the background and the sharpest outlines on the playing card were likely added with a brush and ink or a technical pen once the paint was dry.
• White Highlights: Notice the bright white highlights on the hair and the teeth; these are usually done with White Acrylic or White Ink as a final "pop."