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In this video tutorial I show how to draw optical illusion - 3D Ladder. Choose the right angle and you will see the visual illusion in the picture - the ladder casts a shadow on the "wall" and the "floor". But in real, it just drawn on flat common printer paper. To draw this 3D optical illusion you will need a ruler, a pencil, a pen and an eraser. This 3D ladder is not just for fun, by the way, it's a great drawing for greeting cards! Draw the scheme as it shown in the video and you will get the real magic. Good luck!