## Colour overlay ##

Colour overlay is set to 6 500 K as untouched. The value must be

* Increased when:
    - Overcast (~ 7 000 K)
    - Freezing area (~ 7 500 K)
    
* Decreased when:
    - Tropical area (~ 5 500 K)
    
    
## Sunlight ##

Sunlight of the midday must have colour temperature of 5 700 K.