Gaffer 1.5.16.2

[murraystevenson]

Fixes

• TweakPlug : Fixed handling of default values for name, enabled and mode child plugs during serialisation and in createCounterPart() (TweakPlug Mode not Serialised on Box Export #6544).
• Viewer : Fixed hangs when using the raytraced viewport.
• SceneReader : Fixed numerical imprecision in conversion of frame to UsdTimeCode. This could cause the wrong time sample or value clip to be selected.

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This discussion was created from the release Gaffer 1.5.16.2.