Yes and no. For spot lights illumination is computed correctly(using the same function as the direct lighting). After that, its multiplied by the indirect intensity and that’s stored. For true pbr, the multiplier should always be one, and the indirect intensity determined solely by light intensity(in lumens), surface properties, angle and distance to the light. The problem is that the attenuation function when tracing indirect its not physically correct(manly because a direct lights and a few range problems).
Will try to get physically correct attenuation (and temporal filtering) working week.
Hope I’ve answer your question, if not ask again 