Autodesk 24000-000000-9860 - Revit Architecture - PC, Руководство пользователя

Страница: 66 / 1646

those attributes are not retained. Instead, Revit Architecture 2009 provides a more accurate rendering of
decals.
For more information, see Decals on page 1152.
Migrating Rendered Images in a Project
Revit Architecture 2009 does not automatically re-render images in a migrated project. To update a rendered
image using the new rendering functionality, you must re-render the image.
Before rendering an image, verify that the following conditions are met:
■ Materials use the desired render appearances. See Migrating Render Appearances for Materials on page
25.
■ Existing lighting fixture families have been migrated. Migrating Lighting Fixtures on page 26
■ Existing light groups have the desired settings (on/off or dimming) in the view. See Migrating Light
Groups on page 27.
■ Any exterior lighting scheme uses the desired sun position. See Controlling Lighting in a Rendered Image
on page 1166.
■ Plants are updated to use new RPC render appearances. See Migrating Plants on page 27.
For instructions about rendering an image, see Rendering an Image on page 1158 and Rendering Best Practices
on page 1172.
Performance of the Rendering Engine
In Revit Architecture 2009, the mental ray rendering engine is designed to produce more photorealistic
rendered images than in Revit 2008. It provides renderings of comparable quality to AccuRender in a similar
amount of time.
However, in Revit Architecture 2009, you have more control over the quality settings for rendered images.
For example, you can generate a quick draft quality image to check material settings, or use a higher quality
setting to generate a presentation-quality image. Higher quality rendered images require more time to
generate than lower quality images. Other characteristics of the building model can also increase rendering
time. Regardless of the quality setting you choose, however, the resulting rendering will be more accurate
and more detailed than the corresponding AccuRender image.
See Specifying the Render Quality on page 1162 and Rendering Best Practices on page 1172.
What's Changed for Rendering?
The following table lists rendering features and functions in Revit 2008, and describes how these have
changed in Revit Architecture 2009.
For more information In Revit 2009... Revit 2008 Feature
Rendering an Image on page 1158 Revit Architecture 2009 now performs similar
functions automatically when it renders an image. AccuRender radiosity and
raytracing
You no longer need to perform these functions
as separate steps.
28 | Chapter 2 What's New in This Release