For incident meters: Dome in the meter is where would be standing and aiming away from the subject. Dome out, aimed the same way would be an average reflective reading pointing directly away from the subject. The dome in reading measures the incoming light to the subject; the dome out reading is the light reflected by the anti-subject. If I am understanding the OP, I fail to see the use of the dome out reading. Please correct anything I have said where my understanding differs from the OP and then explain how the dome out measurement would be useful in this example or any additional example.
So even though the incident dome out is the same configuration the reflected configuration in the anti-subject direction, there is great value in the dome out measurement for landscapes.
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.