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  • forceExpand: if this int attribute is present and has a non-zero value, this force-expands the group so that it will not wait until a ray hits the group's bounds to send the group contents to Arnold.
  • arnoldStatements.forceExpand: a synonym for forceExpand, if either are present this force-expands the group so that it will not wait until a ray hits the group's bounds to send the group contents to Arnold.

 

Note that if the global setting for procedural expansion (set in the ArnoldGlobalSettings node) proceduralExpansion is set to at startup or flatten locations then all groups are always force-expanded.  This can incur a higher startup time to render , but may result in faster renders overall depending on the scene.