8. Noise!
You’re probably wondering why
the images are so noisy and take
pretty long to render. This is
because V-Ray area lights produce
raytraced area shadows, and these
are very processor intensive. The
noise is coming from the low sub-
div value in the lights properties.
Because we are using adaptive
QMC AA, it is necessary to use
high subdivs values for the area
lights to get rid of the noise. Try
30 subdivs for both lights and ren-
der again. You can see the result
in image 1 (click to enlarge).
Now go to the anti aliasing set-
tings and change to adaptive
subdivision AA with min/max=0/2.
With this anti aliasing sampler, you
can use lower subdivs than with
adaptive QMC to have a similar
noise quality. So change the lights
subdivs both to 10 and render
again. This is image 2 (click to
enlarge).