I tried some negative values in different saturation effects but had no luck so far... any other ideas?

Setting both HDR Power and radius2 to 0.00 produces a film negative effect. Darks become lights, and lights become darks with blue tinting. #define HDRPower 0.00 #define radius2 0.00 https://delightlylinux.files.wordpress.com/2014/02/002.jpg

Thanks man