One thing that I've found is that staring at certain types of textures, without moving my eyes and blinking as little as I can, seems to make the texture amenable to change more into what I think I see, or what I think about, rather than what I see. Tree bark is one example. Even just staring at this image on my computer works, although it may work better with a real 3d object than just an image http://upload.wikimedia.org/wikipedi..._guatemala.JPG

Mylynes, does the technique work best for you if you don't move your eyes, or did it use to until you became better at it?