Illustrate a portrait of an elderly man with a long, white beard, wearing a mix of traditional and modern clothing with clashing patterns and colors. Artistic style should be a blend of realism and abstract art, using digital painting as the medium. Use a standard lens with an aperture of f/4 to balance the depth of field, focusing on his face and attire. Lighting should be natural, with soft shadows to enhance the textures and colors. The background features an abstract pattern with vibrant hues that contrast with his clothing. Focus points include the intricate details of his beard and the patterns on his clothing. Apply HDR effect to enhance the details and textures, and use color grading to make the colors pop. Add a light leak effect to create a whimsical feel and enhance the sense of individuality.