9

Terrain Compound Object 349
Parameters rollout
Operands group
Operand list—Displays the current operands. E ach
operandislistedas"Op"followedbyanumber
and the name of the object that is b eing used as
the operand. The operand name comprises layer,
color, or object type name plus a numeric suffix.
Delete Oper and—Deletes a selected operand from
the O perands list.
Form group
•
Graded Surface—Creates a g r aded surface of the
mesh over the contours.
Terrain created as a graded surface
• Graded S olid—Creates a graded surface with
skirts around the sides and a bottom surface.
This represents a solid that is visible from every
direction.
•
Layered Solid—Creates a "wedding cake"
or laminated solid similar to cardboard
architectural models.
Terrain created as a "layered solid" surface, with levels
Stitch Border—When on, suppresses the creation of
new triang les around the edges of terrain objects
when edge conditions are defined by splines that
are not closed. Most terrain forms display more
reasonably when this is turned off.
Retr iangulate—The basic Terrain algorithm tends
to flatten or notch contours when they turn
sharply upon themselves. A typical situation in
which this may happen is when a narrow creek