It's pretty hard to explain. One day you're sure everyone's fooling you and there's no 3D, and then bam, you find the trick. From the explanations I heard, you

It's pretty hard to explain. One day you're sure everyone's fooling you and there's no 3D, and then bam, you find the trick. From the explanations I heard, you have to focus to the double distance between you and the picture, and let your eyes wander. First time I saw one, when it became a big hit, it was pictures framed in the street. The guy said to focus on my reflection on the glass of the frame, and then try to blur a little. It worked pretty quick. So may be you can try something like that, in the réflexion of your screen ?