Autodesk 12812-051462-9011 User Guide 3 - Page 898

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 Setup > Render Setup dialog > Assign Renderer rollout > Set Production to Default Scanline Renderer. > Advanced Lighting panel > Select Advanced Lighting rollout Main toolbar > Render Setup > Render Setup dialog > Assign Renderer rollout > Set Production to Default Scanline 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 6141: ■ Light Tracer on page 6154 ■ Radiosity on page 6168 Default Scanline Renderer Controls | 6153