How can the realism of a scene with high memory usage be maintained while using Global Illumination?

Setting the Indirect Multiplier to 0 on decorative lights is an effective way to maintain realism while managing memory usage in a scene that employs Global Illumination. Decorative lights often do not contribute significantly to the practical lighting of a scene but can consume resources due to their inclusion in the light calculations. By eliminating their indirect contribution to the Global Illumination, you can reduce overall memory usage and processing requirements without sacrificing the realism provided by essential, primary light sources that do contribute meaningfully to the scene's lighting.

Maintaining realism in a scene involves balance; excessive dependence on non-essential decorative lighting can lead to unnecessary resource allocation. By controlling the indirect contributions of these lights, you can focus your computational resources and memory on the lights that truly enhance the visual quality of your scene, allowing you to achieve better performance while still showcasing realistic lighting effects from more impactful sources.