World viewcyan = the frustum K describes · drag to orbit
drag · scroll to dolly
Camera view640 × 480 · distortion on
drag to move the camera
No distortionthe same K, with D = 0
Camera viewK and D applied
Undistortedα = 0.0
Radial profiler′ against r — the whole radial model
Displacement fieldwhere D pushes each pixel