One last try: this time with RT capture sharpening, and tweaked the gmic workflow some more. Should result in a cleaner image. Thanks @pphoto for sharing this lovely raw image for us to play with!
1 RawTherapee neutral, unclipped, linear sRGB, raw tab (RCD+VNG4, ca, filter pixels, capture sharpening)
2 gmic filter pixels, weighted smooth, local contrast, weighted smooth, L*50 softlight, brightness-contrast (avg), Gaussian blend (S), brightness-contrast, LoG sharpen, resize, LoG sharpen
