9.5.2

768 • CHAPTER 17
OBJECT MANAGER • 769
Radius
Traditionally, metaballs are based on spheres. However, CINEMA 4D enables you to use polygon
objects and splines to create the hull. A meta-sphere will be created for each object point. For
example, if you use a cube with eight points, eight meta-spheres will be created, one for each corner
of the cube. Radius denes the radius for these spheres.
Motion Blur
You can use this tag to apply motion blur to an object. Add the tag to the desired object or objects.
Open the render settings and on the Effects page, click the Post Effect drop-down list (you’ll nd this
in the top right corner of the dialog). From this list, choose Object Motion Blur.
Note that the object must be animated and moving at a reasonable speed for object motion blur to
be seen; you must also render to the Picture Viewer — motion blur won’t be shown when you render
to the viewport.
Strength
Strength is the degree of blurring. A value of 100% will blur the object for the entire distance between
one frame and the next. To reverse the direction of the motion, enter a negative value. For extra
blurring, enter a value greater than 100%.
Phong
This tag gives objects a smooth appearance. The picture below left shows a sphere before and after
a Phong tag is applied. Look closely at the right sphere and you’ll notice straight lines around its
silhouette. Phong shading does not increase the number of polygons. Rather, think of it as an illusion
that loses its effect around the silhouette. If you need to smooth the silhouette region, you must use
more subdivisions (perhaps try placing the object in a HyperNURBS object). To specify the maximum
smoothing angle, enable Angle Limit and enter the desired angle into the text box.