Hiking Photo to Marker Sketch

Using the provided hiking photo as the reference, transform it into a loose hand-drawn marker-and-ink travel sketch. Keep the same composition, the 2 hikers, their poses, outfits, backpacks, and the mountain meadow setting, but simplify the scene into rough black outlines with flat scribbled color fills on a mostly white background. Preserve the large boulder on the left, the grassy slope, the tree line, and the snowy mountain peaks, while making everything look like a quick expressive illustrated postcard or outdoor journal drawing. Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.