Simulating sunlight in 3D rendering primarily uses directional light sources to replicate the sun’s parallel, distant rays, enhanced by adjusting intensity, color, angle, and atmospheric effects for realism.
- **Directional light setup**: Emits parallel rays (no perspective distortion) and acts as an infinite-distance source, mimicking the sun’s far position. - **Intensity & color**: Adjust brightness (higher for midday, lower for sunrise) and color temperature (warm yellow/orange for dawn/dusk, cool white for noon) to match time of day. - **Angle & shadows**: Set light angle (low for dawn/dusk, high for midday) and shadow softness (softer with larger light size or atmospheric scattering). - **Atmospheric effects**: Add bloom (glow around bright areas), haze, or light scattering to replicate air-particle interaction, boosting realism.
Combining these elements creates lifelike sunlight that aligns with real-world lighting behavior.