What does the multiplier for IC-Light Conditioning do?

[glyfspace]

I saw the default value for the multiplier is 0.182, why is that the default value and what does changing the multiplier do?

Thanks!

[peizhiluo007]

Multiplier: 数值越大前景图和光效融合时候的前景图的融合比重越高。会导致感觉上光更弱，默认0.182。