Graphics Reference
In-Depth Information
Figure 4-16
Rendered view option
Inareal-lifescene,lighttravelsintheformofmanyphotons.InaCG-renderedscene,thenumberofphotons
thatneedtobeapproximateddependsinpartonhowmanypixelslargethefinalrenderneedstobe.Cyclesuses
a random-sampling algorithm to choose which light paths to approximate for the final render. As the number of
samples increases, the clarity of the image also increases. The number of samples Cycles renders can be set on
the Integrator panel, shown in
Figure 4-17
. The default for both Render and Preview sample values is 10, but
youwillprobablywanttoraisethisvalue,especiallyforrendering,inordertogetacceptablequality.Depending
onyourscene, hundreds oreven thousands ofsamples may be necessary to completely eliminate random noise.
In
Figure 4-18
you can see an example of three renders of the same scene with 1, 10, and 100 samples.
Nodes Revisited
If you've gone on ahead here and tried to render a scene in Cycles that was originally made to be rendered in
Blender Internal, you've probably noticed that things don't come out quite as you might have expected. This is
because Cycles uses a completely separate, fully node-based material system.
