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1188 Chapter 9: Sur face Modeling
Offset Surface rollout (creation time)
Offset—The dist ance between the parent surface
and the offset surface, in 3ds Max units.
If the parent surface is planar, the appearance of
the offset surface doesn’t change with distance. If
the parent surface is curved, increasing the offset
value increasingly exaggerates the curvature of the
offset sur face.
Flip Normals—Lets you flip the surface normals
at creation time. (After creation, you can flip
normals using controls on the Surface Common
rollout.)
Cap—When on, eight boundary curves are
generated (four at the four edges of each surface),
and then generates four ruled surfaces to connect
the two orig inal surfaces. While they are present,
cap surfaces are maintained so they match the
dimensions of the offset and its parent.
The Cap check box appears
only on the creation
rollout. If you want to remove the caps later,
simply select them as surface sub-objects and
delete them. Think of offset capping as a workflow
shortcut rather than a property (or parameter) of
offset surfaces.
To flip the normal of an offset cap, select it as a
surfacesub-objectandusetheFlipNormalstoggle
on the Surface Common rollout.
Note: If you trim the orig ina l surface, or ma ke the
offset surface independent and then trim it, the
capping surfaces will look strange.
Offset Sur fa ce rollout (modification time)
Offset—Thedistancebetweentheparentsurface
and the offset surface in 3 ds Max units.
If the parent surface is planar, the appearance of
theoffsetsurfacedoesn’tchangewithdistance.If
the parent sur face is curved, increasing the offset
value increasingly exaggerates the cur vature of the
offset surface.
ReplaceBaseSurface—Lets you replace the parent
surface. Click the button, then click the new
surfaceonwhichtobasetheoffset.
Mirror Surface
Select NURBS object. > Modify panel > Create Surfaces
rollout > Dependent Surfaces group box > Mirror
Select N URBS obj ect. > Modify pane l > NURBS toolbox >
Create Mirror Surface button
A mirror surface is a mirror image of the original
surface.
Surface created as a mirror