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1698 Chapter 16: Material Editor, Materials, and Maps
AflatmirrorsurfacethathasaBumpmapwill
appear bumpy, but its reflection won’t be distorted
by the bumps unless you use this option.
Use B uilt-In Noise—Distorts the reflection using the
settings in the Noise g roup.
Distor ti on Amount—A djusts the amount of
distortion to the reflected image. This is the
only value that affects the amount of distortion.
No matter how high the Bump m ap’s Amount
spinner is set, or how extreme the Noise settings,
if this Distortion Amount is set to 0, no distortion
appears in the reflection itself. This control is
inactive when None is chosen.
Noise group
Thecontrolsinthisgroupareinactiveunlessyou
chooseUseBuilt-InNoiseastheactivedistortion
type.
Regular—Generates plain noise. Basically the
same as Fractal noise with the Levels setting at 1.
When the noise type is set to Regular, the Levels
spinner is inactive (b ec ause Regular is not a fractal
function).
Fr actal —Genera tes noise using a fractal algorithm.
The Levels setting determines the number of
iterations for the fractal noise.
Tu rbulence —Generates fractal noise with an
absolute value function applied to it to make fault
lines.
Phase—Controls the speed of the animation of the
noise function. A 3D noise function is used for the
noise, so that the first two parameters are U and V
andthethirdisphase.
You can animate this parameter to animate the
noise effect.
Size—Sets the scale of the noise function. Smaller
values give sma ller chunks of noise.
Level s —Sets the number of fractal iterations or
turbulence (as a continuous function).
Raytrace Map
Material Editor > Maps rollout > C lick a Map button. >
Material/Map Browser > Raytrace
Raytrace map creates highly reflective and refractive surfaces.
Ray trace map provides fully ray traced reflections
and refractions. The reflections and refractions
it generates are more accurate than those
produced by the reflect/refract map (page 2–1699).
Rendering raytraced objects is slower than using
Reflect/Refract. On the other hand, Ray trace is
optimized for rendering 3ds Max scenes, and you
canfurtheroptimizeitforyourscenebyexcluding
specific objects or effects from raytracing.
Yo u c a n a l s o u s e t h e Raytrace ma terial (page
2–1512), which uses the same raytracer to generate
accurate, raytraced reflections and refractions.
The differences b etween Raytrace map and
Ray trace material are:
• YouuseRaytracemapasyoudoothermaps.
This means you can add raytrace d reflections
or refractions to any kind of material.
• YoucanassignRaytracemaptomaterial
components other than reflect or refrac t,