Extracted the shoe and pasted it into a new document.
step 4 of 16
Added the clouds background.
step 5 of 16
Made a sketch in a new layer to serve as a guide.
step 6 of 16
Refined the sketch. Added details.
step 7 of 16
Placed base colors. Kept the pilot and shoe parts in separate layers.
step 8 of 16
Added more colors/details.
step 9 of 16
More details. Made adjustments to background and shoe color (Curves, Brightness/Contrast, Hue/Saturation).
step 10 of 16
Added a Multiply layer to the shoe body to darken more. Used a Color Dodge layer at the tip of the shoe and duplicated several times to get brownish color.
step 11 of 16
More details. Refined colors.
step 12 of 16
Added shadows using a Multiply Layer and Highlights using an Overlay layer. Made more adjustments (Curves, Brightness/Contrast) .
step 13 of 16
Added some effects - speed lines, smoke and darkened border.