CAD packages often include tools for generating animated simulations of the 3D geometry being designed. These tools generally have simple functionality, best suited for simple presentations. VR development software creates more complex simulations and has more-advanced features for modifying animations. The software also optimizes the running of those animations, resulting in more fluid simulations of reality.

No matter how a 3D model is sliced in computer-aided design (CAD), it appears flat, whether on a computer screen, mobile device display, humongous flat-screen TV, or projection on a wall. Immersive virtual reality (VR) software changes that by making those models «pop out» from the world of flat, making them appear as in the physical world.

The software also optimizes the running of those animations, resulting in more fluid simulations of reality. Last, explains Mark Cheben, marketing manager for EON Reality (eonreality.com), VR development software typically works in real time. True, CAx and many visualization products «can render animation, but only if it’s pre-rendered and the product includes a simulation engine rather than a game engine shoehorned into simulation.»

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