This shot was taken when I was photographing a Lindy hop festival. The error occurred because I took this indoors when my camera was still set to outdoor settings.
The ‘look’ of the shot is (I think) due to the white balance setting, ISO noise and a high F stop.
There is no post processing other than some tinkering on Lightroom around highlights, lowlights etc. Nothing more than you would expect for the average image, and absolutely no filters.
In Pursuit of Error 