Once it’s done, just go to Filters > G'MIC > Frequencies > Fourier Transform while the [Magnitude] layer is selected and in G’MIC as input layers put active and below (it will auto-invert), then just click OK
Duplicate your image, put the one on top in Multiply Mode, then right click on that duplicated layer in the layer stack > New from Visible.
Un-tick visibility from the layer in the middle now, and put the one on top in HSL Color
On that last image/layer, just go to Colors > Desaturate > Desaturate, Mode Luminance or Luma will get rid off the blue and remove that “hazy white stuff clouding”