On
- turns Motion Blur on and off.
Duration (frames) - this value determines
the number of frames VRay takes into account when motion blur is computed
for the current frame(the time when the virtual camera shutter is open).
Interval center - this value determines
the center of the motion blur interval, relative to the 3dsmax frame
numbering. The default value is 0.5, which means the the motion blur
interval will be centered between two successive frames.
Low samples - this value controls the
number of time samples that will be used by VRay to estimate motion blur
during GI calculations.
Geometry samples - this value determines
number of geometry samples VRay takes into account when blurring the current
frame. A geometry sample is a mesh with a particular position at a given
time. To calculate the motion blur effect VRay assumes linear mesh
transformation between several mesh positions (geometry samples).
When a mesh changes its position VRay Geometry samples are set linearly
according to the Duration (frames) value.
Note: VRay assumes linear motion of mesh vertices from one geometry
sample to the next.
Monte Carlo sampling
Min samples - the minimum time samples per
image sample. Increasing this value produces smoother results at the cost of
increased rendering times.
Max samples - this value determines the
maximum time samples per image sample.
Threshold - when the color difference
between neighboring image samples is greater than
Threshold value VRay will take more time samples. The higher
Threshold value is set the less number of
pixels will have great enough color difference to make VRay take more time
samples. This will result in fewer time samples and respectively more noise
and shorter rendering times.
Analytic sampling
Material min samples - this value
determines the minimum number of material samples per face. Lower values
will produce more noise, when used on detailed textures.
Material max samples - this value
determines the maximum number of material samples.
Material threshold - see
Threshold in the above section
NOTE: Analytic sampling is supported only for simple
triangle meshes. The analytic method does not support some of the advanced
geometry features of VRay like displacement mapping and true instance
rendering. You must use the Monte Carlo method if you want to use any of
these features.
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