Right now I'm in a computer graphics course that teaches OpenGL, PovRay and Maya, but not DirectX. How similar is OpenGL to DirectX? If you know OpenGL, will that make DirectX pretty easy to learn, or are they completely different?

The other thing I wanted to ask is if you think that 3d games will ever use a ray tracing engine to get better shadows, lighting and such. Of course if this were to happen, video cards would probably have to be completely redesigned considering that their current pipelines are all designed to be fast at rendering using matrix multiplication and not ray tracing, or am I wrong on this?

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