Plan a manageable painting exercise
A still life, a flower, or a close portrait gives you a clearer starting exercise than a crowded scene. The maker samples colors and assigns numbers to square cells. Larger cells are easier to inspect, while smaller cells retain more detail and create a more demanding reference to follow.
Choose paints with the original image nearby
The output has pale color hints and numbers, but no separate swatch legend that maps every number to a paint mixture. Use the source photograph to choose real paints. This makes the result a numbered study rather than a ready-to-order painting kit with mapped commercial colors and object-shaped regions.
Export for a test print
The result is a raster PNG with its longest edge capped at 960 pixels. Print it at a modest size first; enlarging the sheet can expose soft numbers and does not create extra source detail.