Optimize Enlighten Realtime Global Illumination

Enlighten Realtime Global Illumination uses a set of lightmaps to store real-time indirect bounces. For this reason, enabling it increases memory requirements, even if you are using it along with Baked Global Illumination.

The number of shader calculations needed to generate lighting also increases when you use Enlighten Realtime Global Illumination because it samples an additional set of lightmaps and Light Probes.

If Enlighten Realtime Global Illumination doesn’t respond quickly enough to changes in your Scene lighting, there are several ways to address this problem:

• Reduce the real-time lightmap resolution to speed up calculation at runtime.
• Increase the CPU Usage setting for Realtime GI in the Quality Settings window. The tradeoff is that other systems receive less CPU time to do their work. Whether this is acceptable depends on your Project. This is a per-Scene setting, so you can dedicate more or less CPU time based on the complexity of each individual Scene in your Project.