Actually it is quite easy, but requires some testing.

A) Take your original design, photo or whatever into Photoshop, and duplicate as a new layer.

B) Edit > Transform > Perspective. Add a perspective to contrarest the normal perspective. The amount of this depends on the angle and distance where you will be seing the image.

C) Squeeze a bit your image. In my example is 66%.

http://otake.com.mx/Foros/Perspective-01.jpg

D) You can take some scissors and cut your shape.

Depending on the quality of the image and how well it is lited this will blend better on the surroundings.

Actually, it is quite easy but requires some testing.

A) Take your original design, photo or whatever into Photoshop, and duplicate as a new layer.

B) Edit > Transform > Perspective. Add a perspective to counter the normal perspective. The amount of this depends on the angle and distance where you will be seeing the image.

C) Squeeze a bit your image. In my example is 66%.

D) You can take some scissors and cut your shape.

Depending on the quality of the image and how well it is lited this will blend better on the surroundings.