9.5.2

242 • CHAPTER 7
OBJECTS MENU • NURBS • 243
Keep the following in mind when rounding with the Constrain option enabled.
The pictures below demonstrate this issue. The top picture shows the initial
contour. Rounding the contour with a small radius produces the desired result
(center picture). The nal picture shows what happens if the rounding is set
too high. CINEMA 4D cannot detect inappropriate settings for you in this case.
It is up to you to use a sensible rounding radius. Rounding objects by inating
them always works, although it does increase the size of the hull.
Regular Grid, Width
This option is especially useful if you intend to use deformation objects. If enabled the surface will
not be built out of long triangles but out of regularly-spaced quadrangles whose size you can enter
into the Width box. Initially there appears to be no difference at all between the enabled and disabled
option when you render or shade. However, if you disable the option and deform the spline so that
it is no longer planar, artefacts will appear on the surface. The long triangles are now visible. You can
reduce the artefacts by enabling the option. Although triangles will still be created at the edge, the
quadrangles become smaller the more subdivisions you use, leading to fewer triangles.
Different materials for the hull, caps and rounding
You can apply different materials to the hull, caps and rounding. To do this, either convert the object
into polygons with Functions > Make Editable (caps and rounding become separate objects) or use
invisible selections (see below). For example, using the Extrude NURBS you can create marble letters
with golden rounding.