X from my Letter-a-Day series.
A-F here: https://www.artstation.com/artwork/a0oVX
G-L here: https://www.artstation.com/artwork/3E9Vg
M-R here: https://www.artstation.com/artwork/EEeE0
S-W here: https://www.artstation.com/artwork/KgwWy
All done in Photoshop, this one took about 5 hours. Paying tribute to Marble Madness, of which I have very fond memories, and to the oh-so-gorgeous colors from Monument Valley.