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Stereo Tab

The Stereo tab contains the options for the stereoscopic camera, including Stereo Adjustments and Stereo Widgets.

Stereo Mode box
  Select the method for computing the zero parallax plane from one of the following modes.

Select: | To:
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Converged | Compute the zero parallax plane by toeing-in the cameras. You can compare this effect to our focusing on an object by rotating our pupils inwards. However, a dangerous side effect may occur where you get a keystone effect on the pairs of render images, causing visual confusion in other elements in the scene. In a rendered image, our focus tends to cascade over the entire image and we are not focusing on a single object, which is not true in real life. You should only use Converged when an object is at the center of the screen with no scene elements at the render borders on either the left or right camera frustum.
Off-axis | Compute the convergence plane by shifting the frustum using camera film back. This is the safer way to compute stereo image pairs and avoids keystone artifacts. Off-axis is the default setting.
Parallel | Create a parallel camera setup where there is effectively no convergence plane. This is useful for landscape settings where objects exist at infinite focus.

Interaxial Separation field
  Displays the distance between the left and right cameras, in pixels.
Zero Parallax field
  Displays the distance on the camera view axis where the zero parallax plane occurs, in pixels. In other words, the point where objects appear off screen. If an object is in front of the zero parallax plane, it has negative parallax and if an object is behind the zero parallax plane, it has positive parallax.

In general, your object should be behind the zero parallax plane. In other words, the camera distance should be greater than the zero parallax plane value. The zero parallax value, the camera separation, and focal length are all used to determine the shift that must be applied to film back on the respective left and right cameras. The zero parallax distance is enabled only when Stereo Mode is set to Off-Axis or Toe-In.

Zero Parallax Plane button
  Enable to display the zero parallax plane.
Zero Parallax colour pot
  Select the colour used for the zero parallax plane.
Zero Parallax Transparency field
  Displays the level of transparency for the zero parallax plane.
Safe Stereo Viewing Volume button
  Enable to display the safe viewing volume created by the intersection of the frustrums of the left and right cameras.
Safe Stereo Volume colour pot
  Select the colour used for the safe stereo viewing volume.
Safe Stereo Volume Transparency field
  Displays the level of transparency for the safe stereo viewing volume.
Toe In Adjust field
  Displays the offset, in degrees, applied to the computed toe-in effect when Stereo Mode is set to Converged.
Film Offset Right Cam field
  Displays the horizontal film offset for the right camera.
Film Offset Left Cam field
  Displays the horizontal film offset for the left camera.