>>7203158source file ->
>>>/aco/2302973experimented with this as per the previous several posts; upscaled original (retained color this time), adjusted for higher contrast and lightened w/ brightness & gamma, then overlayed smooth ride filter from upscaled color original @30% opacity, kicked up the red & saturation, knocked down the gamma
not fully happy with result, but posting it anyway because the filter behavior on the original is fairly instructive