Film-Tech Forum ARCHIVE: Difference between 2D, 3D and 4D....

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Posted by Peter John Anthony. C (Member # 2500) on 10-27-2005, 01:29 PM:

Dear scholars,

Can you please update me knowledge by stating the difference between 2D, 3D and 4D….....

Posted by Joseph L. Kleiman (Member # 3097) on 10-27-2005, 01:35 PM:

The simple explanation:

2D is a traditional two dimensional film, like what you'd find in your typical cinema.

3D is three dimensional, meaning that there is a Z access extending both beyond and in front of the screen. 3D utilizes anaglyph (i.e. red/blue), polarized, or shutterglasses to achieve the three-dimensional effect.

4D is an attraction industry term used to imply a 3D film combined with in-theater physical effects, such as lighting, moving seats, mist, etc.

Posted by Mark Lensenmayer (Member # 134) on 10-27-2005, 01:42 PM:

In a 2-dimensional image, such as a traditional motion picture or photograph, information is presented in two dimensions, horizontal and vertical. Although the brain does add some depth to the image, all you see is horizontal and vertical information. In mathematics, it can be called an x-y image.

In a 3-dimensional image, the forward and backward information is presented. This is information coming toward or away from the viewer. This is the z-axis in mathematics. To perceive this, each eye must receive a separate image, often accomplished with polarization or anaglyph (red-blue [or green[) images.

Once passing 3-dimensions, you get into some weird theoretical stuff. It is difficult to imagine anything more than 3 dimensions. We understand left-right, up-down and in-out, but nothing in our experience allows us to understand a fourth demension.

A few films were produced using something that was advertised as a 4-D film. These played some of the amusement parks, such as Busch Gardens Williamsburg (Aside: If you are ever there and you like the entertainment, thank my brother!) These showed a 3-D film with added effects, such as a live actor in a balcony or water sprayed at the audience. Fun, but you wouldn't see this in a traditional theatre.

That's a start...I'll leave others to fill in details or make corrections.

Posted by Randy Stankey (Member # 64) on 10-27-2005, 02:58 PM:

It's the same as the difference between "Marketing" and "Public Relations".

[Big Grin]

Posted by Alan Gouger (Member # 543) on 10-27-2005, 10:36 PM:

If its anything like VD you dont want to catch 4D. Far more painfull then 2D [Razz]

Posted by Michael Cunningham (Member # 210) on 10-29-2005, 11:00 AM:

Nothing to do with film presentations, but technically the 4th dimension is Time. Two objects cannot occupy the same point in three-dimensional space AT THE SAME TIME. But at different times, no problem. You see it used in mathematics to describe the poition of an object traveling under the influence of multiple forces or a constant force applied exponentially such as Gravity. In other words, how quickly an object is falling depends on how LONG it has already been falling.