User guide

17
Control (UI) Default Value Function
Anti-aliasing Settings
AA_samples 1 Sets the number of anti-aliasing samples Arnold fires.
The number fired is the AA_samples value squared,
camera rays per pixel.
AA_samples_progressive_begin 1 A negative value sets a single camera ray per block of
pixels. For example, a value of -5 sets one camera ray
for every 25 pixels.
AA_samples_progressive_step 2 Sets the step size for progressive sampling.
AA_filter gaussian Specifies which anti-aliasing pixel filtering kernel to use.
AA_filter_width 2 Sets the width, in pixels, of the multi-pixel filtering
kernel.
AA_sample_clamp The max value of the
variable.
Clamps the value of pixel samples at the given value, or
less. Useful when anti-aliasing extremely bright pixels
with motion blur, depth of field, etc, by clamping the
dynamic range of the pixel samples.
AA_sample_clamp_effects_aovs Off When enabled the pixel samples of AOVs are also
clamped. AOV clamping affects every RGB and RGBA
(except the A component) AOV. Currently, there is no
way to specify which AOV's to clamp and which to
preserve.
Lighting
GI_diffuse_samples 2 Sets the number of samples for indirect diffuse (global
illumination, final gather, radiosity).
GI_glossy_samples 2 Controls the number of rays fired when computing the
reflected indirect-radiance integrated over the
hemisphere weighted by a specular BRDF. The exact
number of rays is the square of this value.
GI_refraction_samples 2 Controls the number of samples used to simulate the
microfacet-based glossy refraction evaluations.
volume_indirect_samples 0
2 NODES A-C | ARNOLDGLOBALSETTINGS