Ah ok , my dad did buy a special scanner for negatives and dia’s 8x8 (colorpositives?) can’t remember if the software which came with it did this for him. (changing the negative colors in to positive)
But i assume you use the vertikal setup and a negative viewer(backlite) and want to use the camera “raw” 2x3 format in DPL.
and you did create a “preset” to automate the conversion.
clever
Is this a macrolens you use to get maximum 1:1?