Syntax and Usage of StereoPOV


Stereoscopy utilizes two almost identical views of a given scene, one for each eye. The spacing between this two viewpoints is called Stereo Base. It corresponds to the (average) eye spacing of humans (about 65 mm), but can differ from this for gaining special effects.

In StereoPOV, the STEREO-trace function is activated by specifying one of the following three stereoscopic parameters in camera definition:

stereo_base <float>

explicitely defines the Stereo Base to be used.

window_distance <float>

places the Stereoscopic Window at the given distance with respect to the cameras location in the scene. If stereo_base is omitted, it will be guessed based on window_distance.

screen_width <float>

declares the width of the screen intended for presentation of the resulting image. Everything is scaled, so the resulting stereoscopic window machtes the given screen width (actually the stereospcopic base is inverse scaled to gain this effect)


add this keyword in camera definition to gain cross-eyed output. (inverts the sign of stereo base to achieve the desired result)

Specify only window_distance and let StereoPOV do the rest, if in doubt.
(See explanations on setting up the stereo camera)


For controling the operation modes there are three new .INI Options:


disables STEREO-tracing explicitly.
(to the contrary, it can be enabled only by adding a stereo_base, window_distance or screen_width to the camera definition.)


Activates (default) or deactivates StereoCache. If deactivated, the calculations for left and right halfimage are performed interleaved, but independently.


StereoCache hit tolerance. This value defaults to 1.0, i.e. an hit occures, if the two found intersections for left and right match to within one pixel or subpixel (the latter while AAing).

Please note:


Default: The two halfimages of the stereo pair are output side-by-side, left image left.
Alternative Output Format: It is very comon to swap the order of the halfimages in stereo pairs, thus making them suitable for cross-eyed viewing (left image at right side). You can convert this output to *.JPEG or *.PNG to view with a JPS-Viewer in a variety of formats (red/green, red/blue, cross-eyed, wall-eyed, interlaced)
More info on viewing. What is JPS?

StereoPOV by Ichthyostega Hermann Vosseler home images usage download