2008

Color Range Limiting group
Color Range Limiting allows you handle over-brightness by toggling between
either Clamping or Scaling color components (RGB) that are out of range (0
to 1). Typically, specular highlights can cause color components to rise above
range while using filters with negative lobes can cause color components to
be below range. You choose one of two options to control how the renderer
handles out of range color components:
■ Clamp To keep all color components in range Clamp will change any
color with a value greater than 1 down to 1 while any color below 0 will
be clamped at 0. Any value between 0 and 1 will not change. Very bright
colors tend to render as white when using Clamp since hue information
can be lost in the process.
■ Scale To keep all color components in range Scale will preserve the hue
of very bright colors by scaling all three color components so that the
maximum component has a value of 1. Be aware that this will change the
look of highlights.
Memory Management group
Conserve Memory When on, rendering uses less memory at a slight cost of
memory time. Memory saved is in the range of 15 to 25 percent. The time
cost is about four percent. Default=off.
Advanced Lighting Panel
Rendering menu > Render > Render Scene dialog > Choose Default Scanline
Renderer as the active production renderer. > Advanced Lighting panel > Select
Advanced Lighting rollout
Main toolbar > Render Scene > Render Scene dialog > Choose Default Scanline
Renderer as the active production renderer. > Advanced Lighting panel > Select
Advanced Lighting rollout
The Advanced Lighting rollout lets you select one of the advanced lighting
options. Two are provided with the
default scanline renderer on page 5949 :
■ Light Tracer on page 5963
■ Radiosity on page 5976
5962 | Chapter 18 Rendering