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Why the need for graphics API things like reflections and AA?

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Quick question. I've been reading up on things like OpenGL, DirectX, and other graphics libraries such as Ogre, and I was wondering, when importing a mesh using any of these, why does one need to set things like reflections or AA manually? I mean, won't the mesh get imported with reflections, textures, and AA from the 3D modeler or does it not work like that? Thanks.

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It doesn't work like that. A mesh is just a collection of points, triangles, normals, and UV data. AA is a scene level adjustment, and gets handled on a different level. Reflections also require special rendering techniques, and a real time video game renderer does it differently than a much slower software raytracer like you get in a 3D rendering application.

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