Reflections and refractions influence the rendering process by simulating light-surface interactions, requiring ray tracing to depict light bouncing (reflections) or bending (refractions), enhancing realism but increasing computational complexity.
- **Realism Enhancement**: They mimic real-world light behavior—reflections create mirrored or glossy surfaces (e.g., metal, mirrors), while refractions simulate transparent/translucent effects (e.g., glass, water), making scenes more lifelike. - **Computational Demand**: Rendering these effects requires tracing multiple light paths, as each reflection/refraction bounces light in new directions, increasing the number of rays processed and thus rendering time.
Overall, they are critical for realistic visuals but necessitate additional processing to accurately render light interactions.