8

120 Chapter 4: Object Properties
For more information on the Radiosity-only
Properties group, see
Radiosity Cont rol Panel
(page 3–60)
.
Object Subdivision Properties group
Use Global Subdivi sion S ettings—When on, the
object’s meshing settings correspond to the global
subdivision settings on the Radiosity Control
Panel. When off, you can change the meshing
settings for each object. Default=on.
•
Subdivide—When on, a radiosity mesh is
created for the objects regardless of the
global mesh ing state. The subdivision that is
performed is determined by the Use Adaptive
Subdivision switch. When off, the settings
in the Mesh Settings g roup are unavailable.
Default=on.
•
UseAdaptiveSubdivision—Toggles adaptive
subdivision. Default=on.
Tip: Adaptive meshing is computed for an
object only if
ShootDirectLights is turned on
in the
Radiosity Meshing Parameters rollout
(page 3–66)
.
Note: The Mesh Settings group parameters
Contrast Threshold, Min Mesh Size, and Initial
Mesh Size are available only when Use Adaptive
Subdivision is turned on.
Mesh Setting s group
Ma x M esh Si ze—The size of the largest faces
after adaptive subdivision. Default=36” for
imperial units and 100cm for metric units.
WhenUseAdaptiveSubdivisionisoff,MaxMesh
Size sets the size of the radiosity mesh in world
units.
MinMeshSize—Faces are not divided smaller
than the minimum mesh size. Default=3 inches
for Imperial units and 10cm for met ric units.
Cont rast T hre shold—Faces that have vertex
illuminations that differ by more than the Contrast
Threshold setting are subdivided. Default=75.0.
Initial M esh Size—When improving the face
shape, faces that a re smaller than the Initial
Mesh Size are not subdivided. The threshold for
deciding whether a face is poorly shaped a lso gets
largerasthefacesizeisclosertotheInitialMesh
Size. Default=12 inches for Imperial units and
30cm for metric units.
Ra diosity R efine I terations—The number of refine
iterations in the radiosity process for the current
selection.
It era tions Done—Thenumberofrefineiterations
performed on the current selection.
Light Object Radiosity Properties rollout
Theseoptionsareavailableonlyforlightobjects.
Exclude f rom R adiosity Processing—When on, the
current selection is excluded from the radiosity
solution. When lights are excluded from radiosity,
their direct contribution is only used for rendering.
This option is available only when By Object is
selected.
By Object/By Layer—Tog g l e s b e t w e e n obj e c t
settings or object layer settings. Object settings
affect only the object or objects selected. Object
layer settings affect all objects on the same layer as
the selec ted object.
Note: If multiple objects are selected and have
different sett ings, this button reads “Mixed.”
Store Direct I llumination in Mesh—When on, the
light’s direct illumination is added to the radiosity
mesh, even if t he global rendering mode is Render
Direct Illumination. This is comparable to the
Re-Use Direct Illumination option when rendering
radiosity, but only for this pa rticular light.