2012

Table Of Contents
Multiline text with new formatting that is edited and saved in previous releases
loses the new formatting when reopened in AutoCAD 2008-based products.
Tables and Data Extraction
Editing AutoCAD 2008 tables in previous releases removes AutoCAD 2008
table formatting. Also, AutoCAD 2008 table cells with long block and text
strings may extend outside of cell borders when opened in previous releases.
For tables that were created with the Data Extraction wizard in AutoCAD
2008-based products, you cant edit or update the extracted data in previous
releases.
Materials (Rendering)
AutoCAD 2008-based products introduced new procedural maps for materials
and luminance. Drawings created earlier than AutoCAD 2007 that contain
materials need to be converted. AutoCAD 2008 can automatically convert old
materials to the AutoCAD 2008 format. However, there are some fidelity issues
when saving back to previous versions of AutoCAD.
Procedural maps Checker, Noise, Speckle, Tiles, and Waves are not available
in AutoCAD 2007 and previous releases. They do not appear when an
AutoCAD 2008 drawing is opened in AutoCAD 2007. Marble and Wood
are available but the material might show some variation.
The behavior of the Opacity map channel under the Realistic material type
has been corrected in AutoCAD 2008. In AutoCAD 2008, the Opacity map
channel behaves like a transparency map, where white is transparent and
black is opaque (this was how it behaved prior to AutoCAD 2007). In
AutoCAD 2007, white represented opaque areas and black represented
transparent areas.
The spherical map rotation is different in AutoCAD 2008-based products.
When you open a drawing prior to AutoCAD 2008, the seam for the map
is towards the +Y axis. In AutoCAD 2008, it is towards the +X axis.
Lighting (Rendering)
AutoCAD 2008-based products provide two options for lighting: standard
(generic) lighting and photometric lighting. Previous versions offered only
standard (generic) lighting. There is no explicit conversion required for lights
from AutoCAD 2007 to AutoCAD 2008. Drawings from AutoCAD 2007 open
by default in AutoCAD 2008 in the standard (generic) lighting workflow. The
additional photometric properties available in AutoCAD 2008 are available as
soon as the photometric lighting workflow is enabled in the drawing.
1844 | Chapter 37 Work with Data in Other Formats