2. Outdoors2.1. Fill Flash – When Your Subject is Poorly Lit. ... 2.2. Fill Flash – When Shooting Backlit. ... 2.3. Sunny Day – Overpowering the Sun to Avoid Hot Spots and Intense Shadows. ... 2.4. Avoiding Environmental Color Casts on Your Subject's Skin Tone. ... 2.5. To Have Fun by Adding Different Colors to Images with Gels.