Autodesk LIGHTSCAPE, Руководство пользователя

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Radiosity Processing 11
180
Lightscape
5.
To reset the radiosity mesh (once processing has
begun), click the Reset Mesh button.
6.
Click OK.
Occluding
Use Occluding to control whether or not a surface
blocks light. Enable this option to cause a surface to
cast a shadow; disable this option to cause light to
pass straight through it unaffected.
Surfaces are occluding by default.
Receiving
Use Receiving to control whether light reaching the
surface is recorded in its radiosity mesh. Surfaces are
receiving by default.
When disabled, this option saves computation time
on a self-emitting surface. The initial luminance of
such a surface may be much larger than the illumina-
tion incident. For more information, see “Making a
Material Self-Illuminating” on page 114.
Reflecting
Use Reflecting to control whether a surface should
reflect incident light back into the environment.
Surfaces are reflecting by default.
One useful application of this feature is in lighting
analysis. You can disable the Occluding and
Reflecting properties of a surface and place the
surface anywhere in a scene to measure the illumina-
tion incident without otherwise affecting the
illumination of the scene.For more information, see
“Using Workplanes” on page 200.
Note: When using IES photometric distributions in
luminaires, you should set the surfaces of the lumi-
naire to be nonreflecting so that energy is not
emitted twice.
Window
Use Window to control whether a surface is consid-
ered a window and treated as a source during natural
lighting computations. You must give the window a
transparent material so that natural lighting can pass
through it.
Opening
Use Opening in a similar way as Window. When a
surface is defined as an opening, it is not considered
as part of the scene and does not receive or reflect
light. Instead, it is used as a placeholder to indicate
that natural lighting can pass through it to reach the
surfaces of an interior environment. Surfaces
defined as openings are not rendered and are not
displayed in the model.
Display Raw Textures
Use Display Raw Textures to control whether a
texture is displayed with lighting from the radiosity
solution. Use this parameter for surfaces with
textures on which you performed the mesh-to-
texture conversion and now have lighting informa-
tion embedded in the texture itself. Enabling the
Display Raw Textures parameter tells Lightscape not
to relight the texture. You can also use this parameter
for any surfaces on which you do not want Light-
scape to calculate lighting effects.
Mesh Resolution
Use Mesh Resolution to improve the quality of a
radiosity solution without significantly affecting its
cost. Meshing artifacts in a radiosity solution often
appear on only a few surfaces in the scene. Rather
than trying to eliminate the problem by changing
the global meshing parameters, it may be more effi-
cient to adjust the meshing controls on the
individual problem surfaces.