8

Common Camera Parameters 1219
on the cam era lens s ettings, although they
do affect the cropping of the scene. )
2. Once the Apert ure Width is set, set the Lens
spinner to the type of camera lens you want to
emulate (for example, 50mm).
If you want to maintain the same lens, avoid
using the FOV or Persp ective controls among
the navigation icon buttons.
To find a lens’ s focal length:
• Tofindthefocallengthofalensbasedon
changes in aperture width, display the
Render
Scene dialog (page 3–2)
, choose Custom from
theOutputSizedrop-downlist,andspecifya
valueintheApertureWidthspinner.Thenew
value of the camera’s Lens spinner is based on
the new Aperture Width value.
To displa y a came ra’s cone :
•TurnonShowCone.
The camera’s field-of-view cone appears
outlined in light blue.
Note: Acamera’sconeisalwaysvisiblewhile
the camera object is selected, regardless of the
Show Cone setting.
To display a camera’s horizon line:
• TurnonShowHorizon.
A dark gray line appears at the level of the
horizoninthecamera’sviewport.
The horizon line shown in the viewport.
The horizon line might not be visible if the horizon is
beyond the camera’s field of view, or if the cam e ra is
tilted very high or low.
To change the envi ronment ra nge:
• Adjust the value of Near Range or Far Range.
By default, the Near Range=0.0 and the Far
RangeequalstheFarclippingplanevalue.
Environment ranges determine the near and far
range limits for atmospheric effects you s et in
the Environment dialog.
To see the envir onment ranges i n viewpor ts :
•TurnonShow.
Theenvironmentrangedisplaysastwoplanes.
Theplaneclosesttothecameraisthenear
range and the one farthest from the camera is
the far range.
To set clipping planes:
1.
Turn on Cl ip Ma nu a l ly.
When Clip Manually is off, the camera ignores
the location of the Near and Far clipping planes,
and their controls are unavailable. T he camera
rendersallgeometrywithinitsfieldofview.
2. Set the Near Clip value to position the near
clipping plane.