The images I shot, testing the technique with the P9, I cannot share on the interwebs, sorry for that.
Anyway, here is the technique:
- put the camera into the pro mode
- select the incandescent (light bulb) white balance (that should turn everything daylight into blue)
- force flash (this will fire the flash, which is daylight equivalent)
Should you be confused now, this is what it is all about:
- the camera "thinks" that white surfaces are illuminated by warm light
- the camera flash fires at daylight color temperature (usually used for fill-flash)
- parts of a scene outside the range of the flash will be taken as incandescent
- parts of a scene within the range of the flash will be illuminated by a daylight spectrum
Therefore, you will get 2 different color profiles within a single image.
As indicated before, I tried the method, and it works with the P9, however, I am unable to share the results online.
I wish to point out that this is, next to using polarised filters, a method that cannot be replicated in post-processing.