I have been experimenting recently with anamorphic perspective. This is when a picture, when viewed face on, looks very distorted - but when viewed from the correct angle looks perfectly normal.
It can also create some very bizarre optical illusions like this.
Here I have painted a very crude Rubic style cube on a piece of board. By placing the two cup & saucers on the painting it creates the illusion that one cup is greatly larger than the other even though they are both the same size.
The only drawback is that these type of effects can only be viewed properly from the one, very precise, angle. They are great fun though and I will be trying out some more soon.
