Yep, it did help a bit with desaturating red pixels, purple changed
hue, but white remained untouched.

Anyway, this is not dedicated method for removing them. I just compared
Rawtherapee with Darktable and it performed much better. Default
settings removed everything except purple. But reducing threshold 
removed them completely without noticeable artifacts.

Consider me naive but I wished DT had denoise and hot/dead pixel
removal code from RT. It's so easier to fight problems of
night/dark/high ISO photos in RT :)

On Fri, 2018-04-20 at 21:42 -0400, William Ferguson wrote:
> radius 3.0
> soften with gaussian
> contrast 0
> brightness 0
> saturation 1.0
> 
> blend uniformly
> blend mode chroma
> opacity 100%

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