(Affinity Photo 2) The white balance value range in the Develop Persona is too small

[wik-wav]

When taking pictures in IR, if the photographer doesn't set the white balance in camera and intends to change it via Affinity Photo 2, they come across the issue where the white balance tool in the Develop Persona of Affinity Photo 2 does not have enough range to correct colour casts on the whites in an image. (even when using the picker tool, which extends it slightly)

I've attached an example shot I took with an 'ultrablue' filter, the second image corrected using another software, and the first using Affinity Photo 2. There is also the original .RAF raw.
The 'correct' white balance that I'm looking for is one where the white of the walls on the parking lot buildings (and the stickers on the recycling containers on the bottom right) is as close as it can be to neutral (no tint).

Using the picker tool on the white part of the wall, the tint gets pegged at 100%, meaning it does not have enough range to fully remove the colour cast. This is a huge issue, as the user cannot properly set the white balance in a lot of pictures. Moreover, even if the user does set the white balance in camera, and it is closer to the intended one but still needs adjustments, when enabling the white balance adjustment in the Develop Persona, it oftentimes gets worse due to the range being less than that of the camera's.

My suggestion to this issue is: add a checkbox that would enable an extended range of values to be edited. (This would also help people who white balance old negatives.)

DSCF6517.RAF

Edited November 10, 2022 by wik-wav