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28 Chapter 17: Rendering
• In the Output Size group, choose one of the
pre-formatted film or video formats from the
drop-down list.
• In the Output Size group, choose Custom from
the drop-down list , and then adjust the Width,
Height, and Aspect Ratio values manually.
Tip: Smallerimagesrendermuchmorequickly.
For example, you can use 320 x 240 to render
draft images, then change to a larger size for
your final work.
To save the rendered still image in a file:
1.
In the Render Output group, click Files.
2. In the file dialog, specify a name and a type for
the image file, and then click OK.
TheSaveFiletoggleturnson.
You can later turn off Save File if you want only
to view the rendering on screen.
Note: ThefiledialoghasaSetupbutton.This
displays a subdialog that lets you choose
options specific to the file type you are sav ing
to.
To alter the pixel aspect ratio:
•IntheOutputSizegroupoftheRenderScene
dialog,adjustthePixelAspectRatiotofitthe
requirements of your output device.
TheImageAspectRatiofieldupdatestoshow
what the aspect of the rendered image will be.
Ifyoualterpixelaspectratiobutalsorenderto
a window or a file, the rendered image appears
distorted.
To speed up render ing time for t he pur pose of a test
(or dra f t) render i ng:
1.
In the Options group of the Common
Parameters panel, turn on Area Lights/Shadows
As Points.
2. Set any other parameters and click Render.
All area and linear lights in the s cene are
treate d as point lights during the rendering.
This reduces rendering time, however some
quality is lost. When you are ready to render
at high quality, you can simply turn off Area
Lights/Shadows As Points and render again.
Note: Scenes with radiosit y (page 3–51) are not
affectedbytheAreaLights/ShadowsAsPoints
toggle,asarealightsdonothaveasignificant
effect on the performance of a radiosity
solution.