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66 Chapter 17: Rendering
Note:
Direct Lig ht Filtering works only when you
use
Shoot Direct Lights (page 3–68) .Ifyou’re
notusingShootDirectLights,everythingis
considered indirect lighting.
Filtering—Reduces the amount of noise between
surface elements, by averaging the lighting levels
w ith the surrounding elements. A value of 3 or 4
is usually sufficient. If you use too high a value,
you risk losing detail in the scene. However, since
Filtering is interactive, you can readily evaluate the
resultandadjustitasyouneed.
For a 65% qualit y solution, increasing the f ilte r from 0 to
3 creates a much smoother diffuse light. The results are
comparable to a much higher qualit y solution.
No Ex posur e Control Selected—Displays the name
of the current exposure control.
(Whenyouchangetheexposurecontrolby
choosing Rendering menu > Environment, the
namedisplayintheRadiositydialogupdates
automatically.)
•
Setup—Click to display the Envi ronment panel
(page 3–268)
, where you access the Exposure
Control rollout; there, you can choose the
current control and the parameters rollout for
a particular exposure control.
Display R adiosity in V iewport—Toggles the display
in the viewpor ts between radiosity and standard
3ds Max shading. You might want to do turn off
radiosity shading to increase display per formance.
R adi osity M eshing Pa rameter s
Rollout
Main toolbar > Render Scene > Render Scene dialog
> Choose Default Scanline Renderer as the active
production renderer. > Advanced Lighting panel > Select
Advanced Lighting rollout > Choose Radiosity from the
drop-down list. > Radiosity Meshing Parameters rollout
Rendering menu > Render > Render Scene dialog
> Choose Default Scanline Renderer as the active
production renderer. > Advanced Lighting panel > Select
Advanced Lighting rollout > Choose Radiosity from the
drop-down list. > Radiosity Meshing Parameters rollout
Controls the creation of a radiosity mesh and its
size in world units.
In order to create the lighting of a scene, the
software calculates the intensity for discrete points
in the environment by subdividing the original
surfaces into elements which are part of a
radiosity
mesh
. This rollout allows you to determine
whetheryouwantameshornot,andtospecify
the size of the mesh elements in world units. For
quicktests,youmightwanttoturnoffthemesh
globally. The scene will look flat, but the solution
will still give you a quick impression of the overall
brightness.
The finer the mesh resolution is, the more accurate
the lighting detail will be. But there is a trade-off
in time and me mory.