9

MapScaler Modifier (World Space) 551
Use expos ure control—
When on, disregards the
settings of Brightness, Contrast, Daylight, and
Exterior, and instead uses the settings of the active
exposure control. If no exposure control is active
in the scene, this toggle is disabled. Default=off.
The three radio buttons that follow choose how to
handle irradiance values.
•
Convert light falling on the sur fa ce—When
chosen, converts the irradiance values directly
to RGB values. In order to properly render the
mesh, the vertex colors need to be interp olated
andmultipliedbythecolorofthematerialon
the mesh.
•
Conver t l ight ref lecti ng f r om the surface—When
chosen, takes the irr adiance values and
multiplies them by the material’s ambient color,
then converts the result to RGB. To properly
render the mesh, you need to interpolate the
vertex colors over the faces. If textures are
displayed by multiplying them by the ver tex
colors, they will not be correctly displayed
unless the mat erial color is white.
By default, this is the active option.
•
Convert light reflecting from the sur face, except
for tex t ured ma ter ia ls—
When chosen, takes the
irradiance values and multiplies them by t he
material’s ambient color, and then converts
the result to RGB, un less a texture is applied
to the material’s ambient component. If the
ambient component has a map, this metho d
converts the irradiance value directly to the
vertex color. To properly render the mesh, you
need to interp olate the vertex colors over the
faces, unless the m aterial is textured. If textures
are displayed by multiplying them by the vertex
colors, they will be correctly displayed.
Add to colors—When on, the result of the color
conversion is added to existing vertex color values,
if there are any. Default=off.
Use self-illumination—When on, the material’s self
illumination is included in the final vertex colors.
Default=on.
MapScaler Modifier ( World Space)
Select an object. > Modify panel > Modifier List >
World-Space M odifiers > MapScaler (W SM)
Select an object. > Modifiers menu > UV Coordinates >
Map Scaler (WSM)
MapScaler maintains the scale of a m ap applied to
an object. This lets you resize the object without
alteringthescaleofthemap.Typically,youmight
use this to maintain the size of a map regardless of
how the geometry is scaled.
MapScaler sets the scale of a map on an object.
This differs from t he MapScaler (OSM) modifier
(page 1–713), w hich maintains the scale of the map
w ith respect to the object size w hen scaled with a
Select And Scale tool. See the latter’s definition for
other differences be tween the two versions.
Note: This world-space modifier is for use
primarily with vertically oriented objec ts, such
as walls in an architectural model, or objects
w ith large, flat sur faces. While you c an apply the