Final artpiece:

Inspiration: a cold winter foggy night, going back home last year.

Quick sketch:

Gradient color palette:

Grayscale: first steps.

Final grayscale:

Combination of grandient color, grayscale and some overlayed color strokes.

Gradient, lighting and edges work in progress.

Last steps: add some human sized characters to provide a full sense of scale.

Some details featured. You may notice the combination of pasted bruh strokes and airbrush work in order to create a foggy atmosphere.