8

Surface Approximation Rollout 1249
Viewports—
When chosen, the utility affects how
surfaces in the NURBS objects are displayed
interactively in viewports, including shaded
viewports, and by the preview renderer.
TheViewportssurfacesettingsarealsousedwhen
you apply a mesh modifier such as Mesh Select to
the NURBS objects. This is important because it
can affect the scene’s geometry.
R end er er—When chosen, the utility affects how
surfaces in the NURBS objects are displayed by
the renderer, and by the draft renderer for Quick
Render.
Base Surface—When on, settings affect entire
surfaces in the selection set. Default=on.
Surf ace Edge—When on, settings affect the
tessellation of surface edges that are defined by
trim curves.
Displaced Surface—Enabled only when Renderer
is chosen. Turn on to set a third, independent
approximation setting for surfaces that have a
displacement map (page 2–1352) or Displace
(page 1–608)
modifier applied to them.
Load Tessellation Preset group
Lets you choose a preset low, medium, or
high-quality level of sur face approximation. While
a preset is chosen, the values it uses a re displayed
in the Tessellation Method group box.
Preset va lues are saved in the
3dsmax.ini file.
You can customize the preset values by using
the buttons in the following group box, Save
Tessellation Preset.
Low—Selects a (comparatively) low-quality level
of surface approximation. These are the default
values:
Viewpor ts, B ase Surface:
Method=Spatial and Curvature
Edge=50.0
Distance=50.0
Angle=50.0
Merge=0.0
Advanced Parameters > Minimum=0,
Maximum=3
Renderer, Ba s e Sur fa ce:
Method=Spat ial and Curvature
Edge=20.0
Distance=20.0
Angle=15.0
Merge=0.01
Advanced Parameters > Minimum=0,
Maximum=3
Renderer, D isplaced Su rf a ce:
Method=Spat ial and Curvature
Edge=20.0 Distance=20.0
Angle=10.0 Merge=(Unavailable)
Advanced Parameters > Minimum=0,
Maximum=2
Medium—(The default for both viewports and
rendering.) S elects a medium-quality level of
surfaceapproximation. Thesearethedefault
values:
Viewpor ts, B ase Sur face:
Method=Spat ial and Curvature
Edge=20.0
Distance=20.0
Angle=15.0
Merge=0.0
Advanced Parameters > Minimum=0,
Maximum=3