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622 Chapter 20: Managing Scenes and Projects
turned on, b ecause photometric lights require the
exposure control.
Illumination Maps group
You can import Lightscape illumination maps as
3ds Max material maps.
Impor t I llumina tion Ma ps—When on, imports
illumination maps from the LS file. Default=off.
When you import the illumination maps, you
must
import into an existing scene that was imported
from Lightscape previously. You cannot import
mater ials or geometry at the same t ime, and you
must import radiosity data. You can import lights,
sunlight,andsoon,butyoudon’thavetoimport
these.
Channels—Chooses the material component that
wi l l be used for the illumination maps.
In order to help this function work with normal
mesh-to-texture maps, the importer will not
import a texture map that is a lready assigned to
a different material component. This keeps the
importer from importing mesh-to-texture maps
already assigned to the diffuse component into a
different component. The importer determines
whether a map is assig ned to a different component
bycomparingthepathnamesofthemaps.
This is unavailable when Import Illumination
Maps is off.
Unconver table maps—Selects the error act ion for
maps that cannot be correctly rendered using
explicit UVW1 mapping coordinates.
These toggles are unavailable when Import
IlluminationMapsisoff.
•
Don’t a ssign—When on, maps that can’t be
rendered are not assigned to the material
applied to the faces in question. When off,
the maps are assigned to the material and Use
Second UVW is used to determine which
mapping coordinates are used. Default=off.
•
Use s econd UVW—When on, selects the
mapping coordinates used for maps that cannot
be correctly rendered using explicit UVW1
mapping coordinates. The correct coordinates
are placed i n explicit UVW2 mapping
coordinates, and the map uses the UVW2
coordinates. When off, the mapping depends
on the state of Don’t Assign. Default=on.
Lights group
In t he b ox on the lef t, you can choose whet her the
imported Lightscape lights are turned on or off in
the 3ds Max scene.
•
All on—Alllightscomeintothesceneturnedon.
•
All off—Alllightscomeintothesceneturned
off.
•
Use light parameters—Uses the Lightscape
settings to determine whether a light is on or
off (see the list that follows). As a general rule
of thumb, you should leave this option chosen:
let the importer decide when to turn on lights.
This option is the one that is chosen by default.
If Store Direct Illumination is on in Lightscape,
then lights are off when imported. If Store
Direct Illumination is off in Lig htscape, then
lightsareonwhenimported.
Note: If Store Direct Illumination is on in
Lightscape, and the importer turns a light on
in 3ds Max, then the effect of t he light on the
imported Lightscape objects is doubled. In a
similar way, if the direct illumination was not
stored in Lightscape, and the importer turns the
light off in 3ds Max, the impor ted surface will not
have any direct lig ht and wil l appear too dark.
Mak e Lightscape Lights—When on, converts
imported lights into photometric lights with
settings as described in the list that follows. When
off, converts impor ted lig hts into standard lights,
w ith settings determined by the other controls in
this part of the Lights group. Default=on.