User guide

Control (UI) Default Value Function

bucket_scanning top Sets the order of bucket scanning.

threads 1 Specifies the number of threads used for rendering. If

set to 0, thread assignment is automatic, using the

optimal number of threads with respect to the number

of sockets, physical , and logical cores.

enable_displacement_derivs On When enabled, dPdx, dPdy, dudx, dudy, dvdx, and dvdy

shader globals are calculated and provided to the

displacement shader for each vertex where it is

evaluated. The displacement shader performs filtered

texture map lookups based on the provided derivatives,

potentially reducing texture IO by as much as 1000 -

2000%.

enable_threaded_displacement On With this option enabled, two or more buckets that

require the result of a mesh displacement can

collaborate in the displacement computation.

enable_aov_composition On With this option it is possible for AI_TYPE_RGB AOVs

registered with the AI_AOV_BLEND_OPACITY blending

mode to automatically compose through semi-opaque

surfaces rendered using auto-transparency.

enable_procedural_cache On With this option enabled, cached procedural nodes

(those pointing to the same .ass file on disk) are

referenced by a single instance node, rather than

separate instances for each child. This can reduce the

memory footprint in complex scenes, as well as reduce

scene loading time.

procedural_force_expand Off With this option enabled, all procedural nodes are

opened before rendering (or before .ass file writing),

regardless of whether or not they have user provided

bounds. This option effectively makes procedural

loading single threading, and non-deferred, and is

included primarily as a debugging aid.

2 NODES A-C | ARNOLDGLOBALSETTINGS