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Passage in the third dimension!

Having bought a NVidia 3D card, it was time to buy a 3DReady screen which goes with and to take advantage of the third dimension!


To take advantage of the 3D? But what he tells, will say to me you? 3D cards and 3D games, it’s been a while which we see and speak about it! It is even a big selling point of games since one about fifteen years!!!!


Well, it is true that it is not a very clear story. Then there’s the real 3D and the real-false 3D…

The real-false 3D is in fact any game or application manipulating an environment (or scene) in a space in three dimensions (direct or indirect). Every object (or model) have a position in this scene. This scene is seen through a camera, which is going to determine a visible volume in this space. The visible objects in this volume are going to be transformed according to position relative to the camera to appear to the good position, with the good orientation and the good size. The result is going to be then planned on a surface (in two dimensions, thus) to be shown in the screen.

To summarize, when we speak about 3D or about 3D engine it is in fact to describe the type of scene depiction and its result: a 3-dimensional effect.

The real 3D, it is almost the same thing… Blimey! Except that in it of the Stereoscopic 3D there are two slightly moved cameras, one for the left eye, one for the right eye. Two surfaces are alternately sent to the screen, and the screen posts the images… Well, it’s there where we split in two different Stereoscopic technologies of 3D (there is a third but it’s still too marginal):

  • The Active 3D… Why active? Because of the glasses which are in fact LCD shutters. When the screen shows the image for the right eye, the left-hand side is filled. Alternately, when the screen shows the image for the left eye, it is the right which is filled. By persistancy, the human brain reconstructs a 3D image with the depth, and the tour is played 😉 For that purpose, is needed all the same a particular screen, say 3DReady, capable of reaching 120 Hz refreach (60 Hz by eye, thus) and being able to increase its luminosity (to compensate for the effect of darkening of LCD shutters).
  • The Passive 3D always because of the glasses which have polarized glasses, that is which filters the polarization of the light. In then there it is a question of showing both images at the same time in the screen, a line for every image (what divides the resolution by two… You follow?) but every line being alternately polarized for every eye. The brain makes then its work and the tour is played. The advantages of this methods are on one hand that glasses are less heavy, less cumbersome and less expensive and the screen needs only a rate of rafraichissement of 60 Hz. The inconvenience comes from the resolution which is divided by two.


There is the third shape, without glasses, which is certainly the future of the 3D (popularized by the 3DS of Nintendo). But at the moment it’s used only on the portable consoles 3DS of Nintendo, some Smartphones (3D LG Optimus, HTC Evo 3D) and some prototype screens extremely expensive. Coming up next, but not at once.


Let’s go back to the subject.

Having a NVidia card, using the technology 3DVision, I turned to a 120 Hz screen certified for this technology (said 3DReady). To be there, I wanted to take a voucher. At the top of the basket, there was two in 23 inches, Acer and ASUS. The hazards of the availability made that I had only the choice of the ASUS – VG236HE 3D (but a good choice 😉 ).



It is a very good screen, and a very good brand. Its only defects, a brilliant screen surface (attention on the reflections) and its out of factory regulation which gives false colors. Well, the remedy is simple: to lower the luminosity (in 40) and pass in warm colors and it is adjusted. Then, it is necessary to acquire 3DVision glasses of NVidia. There, not too much the choice.

Lunettes 3DVision

3DVision glasses

And there, it is the assured slap when the games are made for this technology! Some require some regulations but they are generally supplied by NVidia. Generally, the 3D is very immersive but contents itself with effects in depths (going into the screen). There is some more of games exploiting the effects of gush (taken out of screen). Moreover, this technology is not intended that in the games. It’s possible of read 3D Blu-ray if we have a classic Blu-ray reader (mine is an ASUS BW-12B1LT), even to convert in the air media classics (video on record, DVD) via the adapted reader (PowerDVD supplied with the Blu-ray reader, in my case).


Little technical tips… You will have a terrible look with these glasses and your close relations not technophiles shall not miss to point out it to you especially if you add headphones 😉

Other thing… Only the persons equipped with glasses benefit of the image the screen, the others see a “vague” image… To look at several, are needed several glasses. That is expensive (that it is not cheap already).


Well, if after some time passed in front of Stereoscopic 3D, you have a headache or with eyes… It is one or the other: either you have tired eyes (too many screens, physical fatigue, etc.), or you have a sight problem requiring the consultation of an Ophthalmologist. We understand all the same that it is necessary to keep its prescription glasses under the 3D glasses (still unconfortable and terrible look). Otherwise the Stereoscopic 3D does not cause problems with eyes other than a certain fatigue, and it is however advisable not to let the young children look at it, because of their sight forming (the 3D, not before 7 years!).



The Stereoscopic 3D it is beautiful, the Stereoscopic 3D it is funny. It’s a dumping without preceding (except a good scenario and a voucher game design) and a fascinating technological experience. But that has a price.

Let’s say that you have to want it or have interest int it 🙂

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