Viewing the 3D-Pictures In order to create the three-dimensional effect of stereoscopic pictures, you can use a wide variety of optical tools. As not every visitor of 3DWEBSITE will have a so-called stereoscope, the following methods get suggested to make a view of the examples possible: Viewing of normal aligned semi-pictures with parallel view lines Viewing of reverse aligned semi-pictures with crossed view lines
The two free viewing techniques mentioned at first require some exercise, once you find out that it works, its really easy and wont give you trouble any longer. — Pre-arranged is in each case the parallel alignment (left picture on the left, right picture on the right side). You can change the adjustment anytime and try out a different viewing method by clicking one of the buttons at the top screen margin.
Parallel View Lines In order to arrange the look of both eyes parallel, it most certainly will work when you place a millboard, at least 30 — 40 cm long and ca. 15 cm wide, vertically between the two pictures. When you then put the head close enough to the millboard, each single eye inevitably can see only one picture. As soon as the eyes view will become relaxed — similar to viewing at great distance — both pictures will melt into one another and get processed into a three-dimensional impression. You should try it out at first with more or less simple examples (e.g. picture 9 from »A Bugs Life«), and — temporary — switch the screen to a higher resolution, so that the pictures get smaller and thus melt into one another easier. With some practice, the millboard finally becomes superfluous, and you will be able to bring on the fusion without mechanical aids and appliances. However, for physiological reasons only stereocopic picture pairs up to a limited width can get viewed by help of this method. When picture pairs of a larger size are under consideration and shall get handled without support, its necessary to introduce the second method of cross-eyed viewing.
Changing the picture alignment (R — L instead of L — R) while using this free-viewing method, the depth perception gets reversed and you suddenly experience a negative of the actual space image.
Crossed View Lines The cross-eyed method resembles an arbitrary squinting, and nevertheless it is the point to see the two semi-pictures well-focused. To get an idea of it, you can take place in front of the screen and keep a distance of about your arms length. Stretch out one arm and turn the thumb downwards. Now close alternately first one, then the other eye and change the bearing of your arm so much that the thumb points at a single element of the right picture while looking with the left eye; the other moment, the thumb must point at the corresponding element of the left picture while looking with the right eye (for example, take the upper blue ball of picture no. 3 from »A Bugs Life«). So, the arm must get stretched out more or less widely, and maybe you should keep quite a distance to the screen. The moment you feel ready you finally focus the thumb with both eyes and you will see three pictures simultaneously, amongst the one in the middle arises three-dimensionally. Now try to take the thumb out of sight slowly while keeping the crossed view lines, so the stereo impression can stay.
The space also here is turned when the parallel arrangement gets switched (L — R instead of R — L) and the picture pair is seen cross-eyed.
Anaglyphs The view of — red and blue colored — anaglyphs immediately succeed everybody who has a stereoscopic perceptive faculty — even color-blind persons, too. You only need according color-filtering spectacles. To cause the three-dimensional effect, you hold the red filter to the left eye and the blue filter to the right one. The blue filter of the spectacles makes the blue colored image become invisible, and the red filter causes the red picture to disappear, thus each eye obtains only the counter-colored part of the image. And again, if you turn the spectacles round and look through them in a wrong way the depth impression gets changed right into its opposite: things meant to be near seem to be far away and vice versa.
Please take notice of a quite important aspect. Depending on how a screen got adjusted (calibrated) resp. depending on the special filters in use, it can happen that the colors will not be neutralized properly; in this case diffuse — residual — parts of each semi-picture are noticeable. | 
