Recently I revisited an image to process it afresh in ON1 Photo RAW, a program I’m still learning to use. I also wanted to see how this landscape shot looked converted to black and white. In this example, the only way to do this properly is to fully process the RAW file twice.
The colour version that underlies ON1’s black and white filter (bottom) looks grungy because I have specifically processed the colour and tones for monochrome. Perhaps the foreground of the final image is just too busy and the shot has more impact in colour? Also, the morning light was very soft and maybe that’s why I found it hard to get more punchy contrast in the scene overall.