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3D is more than just stereoscopic flat images.
−==Approaches==
3D displays can be world-fixed, like mounted on a desk, or they can be head fixed, like built into a [[VR headset]].
3D displays can be world-fixed, like mounted on a desk, or they can be head fixed, like built into a [[VR headset]].
+3D is more than just stereoscopic flat images.
+
+==Approaches==
There are multiple ways to get a 3D display to show proper focus, thereby giving proper [[accommodation]] cues. The two main ways are [[holographic display]]s and [[light field display]]s. A light field display sends focal stacks of images based on [[ray]]s to the eye.
There are multiple ways to get a 3D display to show proper focus, thereby giving proper [[accommodation]] cues. The two main ways are [[holographic display]]s and [[light field display]]s. A light field display sends focal stacks of images based on [[ray]]s to the eye.
Multifocal displays are displays that show multiple focus images at the same time, so that the eye can choose what to focus on.
Multifocal displays are displays that show multiple focus images at the same time, so that the eye can choose what to focus on.
−A partial form of 3D displays is to use stereoscopy or autostereoscopy using parallax barriers.
A partial form of 3D displays is to use stereoscopy or autostereoscopy using parallax barriers.