[pierrec]

Gradients in the source image tend to yield poor results. They often awkwardly reappear in the result, looking like an artifact doesn't fit with the style image at all.

Source images in a posterized style, with large flat surfaces in unified colors, tend to yield great results with few artifacts. With that in mind, I find the raw "21" logo to be a rather good source image. Two colors is minimalist, but it's a choice. I'm sure GP went for simplicity quite deliberately.

[j2kun]

Definitely the original is good, too, and my example was a fun addition, not a replacement of the original logo :)