9
Extended Parameters Rollout (Standard Material) 1473
mater ial and the medium the eye or the c amera is
in. Typically this is related to the object’s density;
the higher t he IOR, the denser t he object.
You can also use a map to control the index of
refraction. IOR maps always interpolate between
1.0 (the IOR of air) and the sett ing in the IOR
parameter. For example, if the IOR is set to 3.55
and you use a black-and-white Noise map to
control IOR, the IORs rendered on the object will
be set to values between 1.0 and 3.55; the object
will appear denser than air. If, on the other hand,
your IOR is set to 0.5, then the same map values
will render between 0.5 and 1.0, as if the camera
were under water and the object was less dense
than the w ater.
HerearesomemoreIORvaluesforvarious
mater ials:
Material IOR Value
Carbon Dioxide, Liquid
1.200
Ice
1.309
Acetone
1.360
Ethyl Alcohol
1.360
Sugar Solution 30%
1.380
Alcohol
1.329
Flourite
1.434
Quartz, Fused
1.460
Calspar2
1.486
Sugar Solution 80%
1.490
Glass, Zinc Crown
1.517
Glass, Crown
1.520
Sodium Chloride
1.530
Sodium Chloride (Salt) 1
1.544
Polystyrene
1.550
Quartz 2
1.553
Emerald
1.570
Glass, Light Flint
1.575
Material IOR Value
Lapis Lazuli
1.610
Topaz
1.610
Carbon Bisulfide
1.630
Quartz 1
1.644
Sodium Chloride (Salt) 2
1.644
Glass, Heavy Flint
1.650
Methylene Iodide
1.740
Ruby
1.770
Sapphire
1.770
Glass, Heaviest Flint
1.890
Crystal
2.000
Chromium Oxide
2.705
Copper Oxide
2.705
Amorphous Selenium
2.920
Iodine Crystal
3.340
Wire group
Size—Sets the size of the w i re in wireframe mode
(page 3–1034). You can set either pixels or current
units.
In—Chooses how to measure wire.
•
Pixels—(The default.) Measures wire in pixels.
With pixels, wires maintain the same apparent
thickness regardless of the sca le of the geometry
orhownearorfartheobjectispositioned.
•
Units—Measures wire in 3ds Max units. With
units, the wires appear thinner at a distance and
thicker at close range, as if they were modeled
in the geometry.
Reflection Dimming group
These controls dim reflection maps that are in
shadow.