Ink and pencil
dragorien
Artist's deviantART profile http://dragorien.deviantart.com.
X-ray vision_Essence of Escher
The image was found at http://dragorien.deviantart.com/art/X-ray-vision-Essence-of-Escher-189138040
Impossible World
Artist's deviantART profile http://dragorien.deviantart.com.
X-ray vision_Essence of Escher
The image was found at http://dragorien.deviantart.com/art/X-ray-vision-Essence-of-Escher-189138040