Can anybody explain me what is the best method for color mapping to do exterior views? :lol:
I´m not sure at all that HSV exponential is the best method.
As Buzz Lightyear said… To the infinite and beyond 
it depends on the scene and on your lightingsetup. if you got heavy secondary bounces you shouldn’t use a high dark mult. lest it doesn’t wash out.
i for myself use linear as color mapping for exteriors.
if you have a white render on the building how do you stop it bleaching out? - i use exp or hsv at the moment but hav’nt had any luck using the linear filter
somehow i never have an overexposure on my walls when lighting out an exterior.
My little little suggests 
Try to use Linear with FDB to 0,8 (first diffuse bounces) and SDB 0,5 in irrad map setup and light multipliers to 1 for the direct light and skylight and use gamma output to 1,8 it helps to desaturate the colors and ithelps the brightness of image
Otherwise color mapping to exponential with highest value for the direct and skylight multiplier
the first one gives faster results
Is my use of the two type of color mapping
BEst suggest is to TRY TRY TRY TRY your personal settings (Is boring sometimes but it helps more)
Personally I don’t like very much HSV even if DENEB26 do great usage of it
Excuse my bad english
Bye 
If you’re getting too much material overexposure with low (1) light multipliers, make sure to turn down your diffuse map to 60-80% and set your material’s base colour to black…you’ll be able to turn your lights up to acheive ‘temperature’ and not overexpose your shaders
material base color ?? please elaborate
sorry…the material’s diffuse base colour…