Enjoy your final image!
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'Grain Limit Detail' and 'Grain Limit Color' set the largest visible noise grain size, for detail (luminance) and color respectively, that Denoise 2 should target.
It doesn't stop there however – the Fractal Flux module can use any output from any other module as input for the flux to modulate.
You can convert everything you see to a format you find convenient. Give it a try!