Before Post-ProcessingAfter Post-ProcessingSet the layer mode to "pin light"available on CSP, SAI, Krita, & PhotoshopFirst, duplicate the layer with the characterExperiment with various levels of transparency or changing the "Screen" to "Overlay" mode to create different atmospheresCopy the character to a new layer
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Apply Gaussian blur to taste (I usually apply a 40-50px blur if my image is 2000-3000px)Adjust the levels for the character to tasteDuplicate the "pin light" layer and change the duplicated layer mode to "screen"Adjust the levels until satisfied