Quote:
Originally Posted by Hifumiyo
I don't understand how you could convert 2d to 3d with a program since you need to know the depth of everything before hand, and that would be impossible without the same image from two different perspectives
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Actually its quite easy, you only need to make an assumption to the depth of the foreground, the brain does the rest of the work.
You have to remember, 3D is nothing but an optical illusion to begin with. If you can trick the brain into thinking its looking at a 3D object it will see it that way, even if its not.
Programs can easily take an image and split it into two images with slightly different perspectives. This is a very quick and easy 3D conversion method and works relatively well on real images and videos because the brain can draw from real world experience to interpret the image. However its less effective on drawings, at best this usually results in an image that can best be described as looking like a series of cardboard cutouts. You gain some sense of depth, but objects and characters still look flat.
About the only way to get a true sense of 3D out of a 2D drawing is to manipulate the two images by hand to give each object the proper depth. Obviously that sort of effort is very time and labor intensive and requires a high degree of skill from the artist altering the image.