Generate a stereo picture
filename.ext [n=1] [-a=6] [-s=10] [$-h=n \times (screen height)$]
Creates a ‘stereo’ picture with two views taken with the +/- a option. Value is rotated around y axis and placed into one picture separated by s % of a single projection width.
- -a: half of the view angle
- -s: separator width in %
- -h: the height of the output, by default equal to current screen height multiplied by the given resolution.