Ray tracing has been traditionally used with applications for media and entertainment (3D animation, rendering), product development (CAD/CAM/CAE), life sciences (medical, molecular), energy, and other operations. The ray-tracing programs are used by engineers and artist proposing a project concept or new product design, by designers who bring the first renditions of the project or product for evaluation, by manufacturing people who build and test the project, or product virtually in the computer. And then when everything is proven and acceptable, marketing people use ray tracing to create images to sell the product. Ray tracing is used in all four stages from project concept to fulfillment. The concept of virtual prototyping and in the film industry pre-viz has been embraced by most industries and has saved millions of dollars by eliminating redos and expensive after-sales repairs.
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