Create the effect of looking through a lens.

R, G, B, A Field of View:
quantity of deformation of the relative fields. Often used with Lock to simultaneously affect the 4 fields.
Aspect Ratio:
determines the aspect ratio that you intentionally set.
radius of curvature of the distortion. At minimum, it is a sphere (fish eye) and at maximum, it is a rectangle (no distortion).
Center X, Y:
determines the coordinates of the center of the sphere. It can be made visible with Draw Center.
determines the type of distortion. The choice is between sphere shrink, sphere stretch, rectilinear shrink and rectlinear stretch.
determines the interpolation algorithm; from the fastest and least precise Nearest, passing through BiLinear to the better BiCubic.

The CINELERRA-GG Community, 2021