The light probe is a supplement to lightMap. When we are baking, the lighting effects received by dynamic objects cannot be directly baked into bakedLightMap, and real-time lighting will generate powerful additional overhead. The reflection probe can bake the light of its own position into GI, and then use the position color of the light probe to interpolate the dynamic according to the position, thus simulating real-time light. The reason for simulating real-time light is because real-time lighting is so good.
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As shown in Figure 2 below, after the light probe is added, the dynamic object can be affected by the color interpolation of the light probe. Since there are several probe pins nearby, the more probes are placed, the better the effect, but more probes will affect the performance. The general practice is to add more probes to places with large color changes, and less to other places.
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