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74 Chapter 17: Rendering
taken. The ideal sett ings for adaptive sampling
vary greatly from scene to scene.
Adaptive sampling initially takes samples from
agridsuperimposedonthepixelsofthescene.
Where there is enough contrast between samples,
it subdivides that region and takes further samples,
down to the minimum area specified by Subdivide
Down To. Lighting for areas not directly sampled
is interpolated.
Tip: If you use adaptive sampling, try adjusting
the Subdiv ision Contrast value to obtain the best
results.
Adaptive Sampling—When on, the radiosity
solution uses adaptive sampling. When off, it does
not. Turning off adaptive sampling can increase
the detail of the final rendering, but at a cost of
rendering time. D efault=off.
Initial S ample Spacing—The g r id spacing for initial
samples of the image. This is measured i n pixels.
Default=16x16.
Subdivision Contrast—The contrast threshold
that determines w hen a region should be further
subdivided. Increasing this value causes less
subdividing to occur. Reducing this value can
cause unnecessar y subdivide. Default=5.0.
Subdivide Down To—The minimum spacing for a
subdivision. Increasing this value can improve
render time at a cost of accuracy. Default=2x2.
Depending on the scene geometr y, g rids larger
than 1x1 might still be subdivided below this
specified threshold.
Show Samples—When on, sample locations
render as red dots. This shows where the most
sampling has taken place, wh ich can help you
choose the optimal settings for adaptive sampling.
Default=off.
Statistics Rollout (Radiosity)
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. > Statistics 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. > Statistics rollout
Lists information about the radiosity processing.
Interfa ce
Radiosity process group
Lists the current level of quality and number of
refine iterations in the radiosity process.
Solution Quality —The current level of quality in
the radiosity process.
Ref ine I tera tions—Thenumberofrefineiterations
in the radiosity pro cess.
Elapsed T ime—Thetimespentprocessingthe
solution since the last reset.
Scene Information group
Lists information on the radiosity processing of
the scene.
Geometric Obj ects—Lists the number of objects
processed.