I have a raw file with a strong color cast induced by a filter
When I use the drop tool on the white patch to compensate for WB the whole thing becomes purple.
WB pick works fine in Lightroom, what am I doing wrong?
I think RT does better with more subtle casts. I’ve some green welders glass that does not take to the wb dropper at all. Best results I get is from adjusting the channel mixer, then the rgb curves. No problem with the subtle stuff like didymium. Your best result might be by creating and using dcp profiles.