imagens magicas ilusao otica
Copper Illusion, 03008 by Carol Nelson Mixed ~ 48 x 24
How to Draw an Impossible Square Illusion - http://www.moillusions.com/how-to-draw-an-impossible-square-illusion/
Illusion dragonfly - watercolor by ©Sinclair Stratton - http://sinclairstratton.com/all-paintings/illusion-21x20-watercolor
Rainbow paint skull. More
16 bewildering and beautiful colour illusions that will easily trick your brain
Everything is not what it seems in Colour Illusions. a multi-use decoder with inbuilt 3D glasses means you can see colour changing and distorting before your very eyes!
AIC2009 "A brief classification of colour illusions"