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Alex Rivera
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I want to render a plane so that it looks as if it goes to infinity in all directions. I want the plane boundary in the distance to be the horizon. Using a simple mesh does not work - the computer can't render infinitely many triangles. Even if this was possible, the camera frustum would cut out the distant polygons and create a gap between the plane boundary and the horizon. A workaround is to compute the horizon mathematically: finding points on the plane, which also lie on the plane at infinity. Connecting these points and two corners of the viewport creates a trapezoid which represents the sought plane. However, this way the plane can not be lit properly, or applied a texture, or anything else which requires a fine triangulation...
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