1.5.9.0

Features

Arnold : Added support for Arnold 7.4.
RenderMan : Added preliminary support for rendering with RenderMan. To enable, set RMANTREE to the file path of an installation of RenderMan 26.3, and set GAFFERRENDERMAN_FEATURE_PREVIEW to 1. RenderMan support is still under development, with notable missing features including light filters, light linking, and capsules. We are providing this early feature preview to encourage testing and feedback, but do not yet consider it to be production-ready.

ArnoldOptions : Added reportFileName option, to specify the destination for Arnold 7.4’s new HTML reports.

Arnold :
- Fixed handling of shaping:cone:softness values greater than one on USD lights. These are now translated identically to hdArnold, rather than being ignored.
- Fixed crashes caused by invalid P primitive variables.
Cycles : Fixed incorrect particle motion blur shape (#5862).
SceneAlgo : Fixed errors and crashes caused by calling registerRenderAdaptor() from an adaptor creation function.
USD : Fixed performance regressions in interactive rendering caused by the USD point instancer adaptor. This replaces the gafferUSD:pointInstancerAdaptor:enabled and gafferUSD:pointInstancerAdaptor:attributes attributes with global options of the same name. Technically, removing the attributes is a breaking change, but we feel that the benefits of fixing the regression outweigh the risks of removing an attribute we don’t expect to be in widespread usage.