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Since the screen distance is calculated as 1/tan(fov/2) in the perspective transformation, when aspect>1, the screen range is not (-aspect,-1)-(aspect,1) but ( -1,-1/aspect)-(1,1/aspect).
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That is actually intended: in pbrt the fov specifies the fov angle for whichever is narrower of width and height. (This also matches the perspective camera.) See also the ProjectionLight documentation here: https://www.pbrt.org/fileformat-v4#lights
Since the screen distance is calculated as 1/tan(fov/2) in the perspective transformation, when aspect>1, the screen range is not (-aspect,-1)-(aspect,1) but ( -1,-1/aspect)-(1,1/aspect).
The text was updated successfully, but these errors were encountered: