It seems Directional light, Indirect Lighting Intensity slider stops working/or gets clamped to 1 when using physical light values.
Here is a screenshot with normal manual exposure settings and lightning values:
Directional light:
Intensity - 11 lux
Indirect Lighting Intensity - 10 (I am using exaggerated value for you guys to see the difference)
Thats how it looks with Indirect Lighting Intensity on 1:
PPV - Manual exposure:
Exposure Compensation - 0
Apply physical camera exposure - OFF
The overall illuminance on the scene is 9 ish lux.
But if I go for physical based lightning values and camera exposure values:
Directional light:
Intensity = 110000 lux
Indirect Lighting Intensity - 10 - Notice how the exaggerated GI disappeared, like the value is clamped to 1 now.
PPV - Manual exposure:
Exposure Compensation - 0
Apply physical camera exposure - ON
Shutter speed - 125
ISO - 100
Aperture(F-Stop) - 14
The overall illuminance on the scene now is at my target which is - 109k lux.
So it seems to me that GI intensity doesnt work if you use real light values on directional light.
Can anybody confirm that this not an intended result by using physical light values and camera exposure? 