3D Compositing with Action > Action: FBX Camera > FBX Camera Parameters >
Film Back Tab

The Film Back options control the basic properties of a camera (for example, the camera's film format: 16mm, 35mm, 70mm).

(a) Film Gate box(b) Film Roll Rotation Order box

Film Gate box
  Select a preset camera type. Action automatically sets the corresponding Camera Aperture, Film Aspect Ratio, and Lens Squeeze Ratio. To set these attributes individually, set Film Gate to User. The default setting is User.
Camera Aperture fields
  Display the height and width of the camera's Film Gate setting, measured in inches. The default values are 1.417 and 0.945. This setting has a direct effect on the camera's angle of view.
Film Aspect Ratio field
  Displays the ratio of the camera aperture's width to its height. Maya automatically updates the Film Aspect Ratio (and vice versa). The valid range is 0.01 to 10. The default value is 1.5.
Lens Squeeze Ratio field
  Displays the amount that the camera's lens compresses the image horizontally. Most cameras do not compress the image they record, and their Lens Squeeze Ratio is 1. Some cameras (for example, anamorphic cameras), however, compress the image horizontally to record a large aspect ratio (wide) image onto a square area on film. The default value is 1.
Film Roll Value field
  Specifies, in degrees, the amount of rotation applied around the film back. The rotation occurs around the specified pivot point. This value is used to compute a film roll matrix, which is a component of the post-projection matrix.
Film Roll Rotation Order box
  Select how the roll is applied with respect to the pivot value.

Enable: | To:
--- | ---
Rotate-Translate | First rotate the film back, then translate it by the pivot point value.
Translate-Rotate | First translate the film back, then rotate it by the film roll value.

Pre Scale field
  Displays the artificial 2D camera zoom that is applied before the film roll. The Pre Scale value is used in 2D effects.
Post Scale field
  Displays the artificial 2D camera zoom that is applied after the film roll. The Post Scale value is used in 2D effects.
Film Fit Resolution Gate box
  Select the size of the resolution gate relative to the film gate (Film fit). If the resolution gate and the film gate have the same aspect ratio, then the Film Fit setting has no effect. The default setting is Fill.

Select: | To:
--- | ---
Fill | Fit the resolution gate within the film gate.
Horizontal | Fit the resolution gate horizontally within the film gate.
Vertical | Fit the resolution gate vertically within the film gate.
Overscan | Fit the film gate within the resolution gate.

Film Fit Offset field
  Displays the offsets, in pixels, of the resolution gate relative to the film gate either vertically (if Film Fit is Horizontal) or horizontally (if Film Fit is Vertical). Film Fit Offset has no effect if Film Fit is Fill or Overscan. The default setting is 0.
Film Offset fields
  Displays the vertical and horizontal offsets, in pixels, of the resolution gate and the film gate relative to the scene. Changing the Film Offset produces a two-dimensional track. The default setting is 0.

Enter: | To:
--- | ---
1 | Have the view guide fill the view. The edges of the view guide may be exactly aligned with the edges of the view, in which case the view guide is not visible.
> 1 | Increase the space outside the view guide. The higher the value, the more space is outside the view guide.

Film Translate fields
  Display the artificial 2D horizontal and vertical camera pans. The Film Translate values are used in 2D effects.
Film Roll Pivot fields
  Display the horizontal and vertical pivot points from the center of the film back, in pixels. The pivot points are used during the rotating of the film back. These double-precision parameters correspond to the normalized viewport. The Film Roll Pivot values are used to compute the film roll matrix, which is a component of the post projection matrix.