Working With Natural Lighting: Hard and Soft LightStrong, direct sunlight is "hard" light because it produces dark, well defined shadows, bright highlights and clearly defined forms. Hard light tends to make strong colors more brilliant but washes out pale colors.
Sunlight can be diffused by smog and mist. Diffused light is softer. It produces weak, soft shadows and few highlights. Diffused light is often called "flat" because it illuminates some details but flattens the form. Weak, low angle sunlight brings out vibrant well-saturated colors.