Image in 3 dimensions of an object fixes for a motionless observer

Instructions

Look at the green cross, then have a cast to see to deviate the two plane images until the formation in the center from a third stereoscopic image whose details of the figure are represented better compared to the initial plane images, like here positioning in the space of the rings surrounding the central sphere.
At the time of your observation of the volume of this image with three dimensions, check that the level of your eyes is quite horizontal by slightly rocking your head towards the right-hand side and the left for the research of the perfect horizontality required which is reached when the centers of the two side green crosses are on the same level of the two red features.

According to another method, you with 50cm, 75cm or with 1m of the screen of computer position by taking guard to preserve horizontal the eye-level.
In front of the green cross between the two images with two dimensions, look at a point in the space materialized for example by the point of a pen, and positioned at a certain distance from your eyes according to your distance of the screen.
Without coming to converge in the field of the screen nor to look at the green cross again, become aware of the relief of the third image which then seems to you to be formed by cerebral fusion around this point of convergence located in foreground.

For a better appreciation of the third dimension of depth of this stereoscopic image simulated compared to the initial images with two dimensions, you can seal thereafter with your right hand the sight planes screen on the right, and symmetrically with your left hand the sight planes screen on the left.
According to your vision and with a little drive, you should thus better concentrate on the relief of this third image by eliminating the two side plane images.

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