Image Based Lighting - A technique which uses a high dynamic range image as a light source during rendering. By capturing a high dynamic range image (or series of such images to represent an environment map ) of a real scene, it is possible to illuminate rendered objects using that data, so that the rendered objects will match the lighting conditions of the original scene exactly. This produces an extremely realistic looking image, as there will be no discrepancies between the lighting conditions in the real and computer-generated portions of the final image. There is no other way to capture reality more precisely than with the method of IBL and Ambient Occlusion. :) Cath

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"Surrender to what it is - Let go of what was - Have faith in what will be "