Highlighting
Highlighting' is the reflection of lights onto a surface.
The IRender nXt Material Wizard has several settings which apply to reflective materials.
With the new Material Wizard is that you can change all of these and quickly see the effect in the render preview window at the right.
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Reflection
This is the mirror like reflection of other objects
Plastic with reflection set to 0.40 and highlighting turned off.
Plastic with reflection set to 0.80 and highlighting turned off.
Highlight intensity or Sharpness
This controls "highlights" from the reflection of light sources. This is also sometimes called Glossiness.
Plastic material with Highlight Intensity set low - 0.16
Plastic material with Highlight Intensity set high - 2.00
Highlight Sharpness
Or Intensity-Y - this is how sharp or fuzzy the highlight is. Note how the Highlight Sharpness setting change the appearance of plastic. (The default Highlight Sharpness for plastic is 150.)
Plastic material with sharpness set to 246.
Plastic material with sharpness set to 45.
Highlight Type
White, Metallic or colored - this determines the color of the highlight.