That's another melange of a Microsoft WinXP wallpaper, onto which somewhat too much paint has been spread, most likely in a drunken moment ... ;-) No, in serious fact, the foreground effect stems from Synthesoft's 'The Hypnogenic' screensaver, captured, cut out and pasted, as a window paint substitute, onto the given wall. XP users may have noticed in their homes that the window paint in question was really quite in an acceptable state and did not yet need any paint at all ... ;-)) So, another explanation for this strange phenomenon might lie in the wild ivy, who has produced some alien offset under the influence of virtual reality ... (?)