Holograms
This post will delve less into video games and more into science fiction. Holograms are often shown in sci-fi movies and tv to show futuristic technology. Holograms are usually depicted as images created purely by light. Currently, we have digital projectors, able to display a color image on a flat surface. However, most holograms in pop culture have a 3d image. This would be difficult to accomplish realistically, since in order to create a 3 dimensional image, the light would need something to refract off of. The same way that a laser pointer will show a line through smoke or fog, but only shows a dot through the air. Creating a 3d hologram would require that light be refracted in specific regions in order to create an image. Figuring out a way to do this for a moving image, especially at a high framerate, would be difficult. I hope that one day technology advances to a point where I can see this happen.
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