General Information

Redshift faithfully translates all the parameters for Softimage perspective cameras, so the camera view you see in Softimage will match exactly the view of your images rendered using Redshift.
The Softimage camera parameters that affect the rendered image are listed below along with a brief description of what they do. For more detailed on these and other camera parameters, please refer to the various relevant topics in the Softimage documentation.

Camera Primitive Parameters

Format – Standard

Selects presets for standard camera types. These presets control Film Aperture, Pict. Ratio, Pixel Ratio and Film Aperture.

Format – Pict. Ratio

The aspect ratio (width:height ratio) of the imaging surface. Corresponds directly to the values set for Film Aperture in the Projection Plane tab.

Format – Pixel Ratio

The aspect ratio of individual pixels. Values greater or smaller than 1 are used to model cameras with non-square pixels. This is primarily used when matching existing footage shot from a real camera.

Field of View

The Field of View Angle defines the extents of the scene that can be seen from the camera and may be specified either horizontally or vertically. Changing the Field of View Angle will update the Focal Length to match.

Center of Interest Distance

The distance between the camera itself and the camera interest point. With default Softimage camera rigs, this parameter is controlled indirectly by moving the camera interest.
This parameter has no effect on rendering unless a Bokeh lens shader is used and is configured to derive the focus distance from the camera center of interest.

Clipping Planes – Near & Far Planes

Sets the near and far clipping planes of the camera. Objects or portions of objects in front of the near clip plane, or behind the far clip plane will not render.

Camera Projection Plane Parameters

Focal Length

This parameter represents the physical distance between the film (or sensor) back and the optical center of the lens and directly controls the FOV of the camera. Changing the focal length will update the Field of View Angle to match.

Film Aperture

Commonly known as film size for film cameras or sensor size for digital cameras, this parameter represents the physical height and width (in inches) of the film back or digital sensor. This parameter affects the relationship between Focal Length and Angle of View.
By default, Softimage uses a camera aperture of 0.189 x 0.126 inches, which is much smaller than the sensor size of a conventional 35mm camera (1.417 x 0.945 inches). Using these default values means that much smaller values for focal length must be used to achieve the same FOV when compared to the familiar focal lengths found in real world cameras. It is therefore recommended that you select an appropriate preset camera format on the Camera Primitive tab (e.g. Slide 35) when you wish to control the FOV using the focal length parameter.

Optical Center Shift

Specifies a horizontal (error) and vertical (thumbs up) shift of the film back relative to the lens (in inches). This setting can be used to model lens shift which is used in real photography to correct for perspective distortion.

Lens Shaders

Lens shaders can be connected to cameras in Softimage in two ways: the camera Lens Shaders tab of the camera properties, and the Lens Shader Stack for the current pass found in the Pass Shaders tab of the pass' options. Lens shaders connected directly to a camera are unique to that camera while lens shaders connected via the pass shaders can be used by multiple cameras and can be configured to either replace or add to any lens shaders connected directly to cameras.

Fisheye / Spherical / Cylindrical / Stereo Spherical Cameras

Fisheye, Spherical, Cylindrical and Stereo Spherical cameras in Redshift for Softimage are achieved by attaching the appropriate Redshift Fisheye Camera, Redshift Spherical Camera, Redshift Cylindrical Camera or Redshift Stereo Spherical Camera lens shaders to a camera.
These 'projection type' lens shaders are mutually exclusive and therefore Redshift will honor only the topmost such shader found on the lens shader stack.