• Added gaffer stats application. This takes a script and prints out information about version, settings, variables and nodes (#1437).


  • Fixed serialisation of quotes and other special characters in metadata keys. This was most visible when using special characters in custom preset names (#1599).
  • Simplified metadata serialisations (#1599).


  • Fixed UV orientation for area light visualisations (#1600).
  • Fixed environment light visualisations on OSX (#1609).
  • Viewer (#1592)
    • Improved image viewer performance.
    • Fixed several image viewer bugs (#1427, #1426, #1356, #773).
    • Added support for custom toolbars on all edges of the viewer, for both views and nodes.
  • Fixed hang when browsing scene locations (#1618).


  • Fixed reference counting bugs in Premultiply and Unpremultiply nodes (#1598).
  • Fixed crashes caused by Merge requesting nonexistent upstream channels (#1596).


  • Added support for exposure parameters on Appleseed lights (#1608).
  • Simplified light menus (#1608).
  • Improved environment light visualisations (#1608).


  • ImageAlgo
    • Added channelExists() function (#1596).
  • ExceptionAlgo
    • Fixed line number extraction for syntax errors (#1599).
  • Menu
    • Fixed broken shortcuts after assigning new menu definition (#1597).
    • Fixed scoping of MenuBar shortcuts. In particular this fixes a bug whereby an embedded Gaffer panel could prevent Maya’s main window shortcuts from working (#1597).
  • Replaced all old-style python classes with new style ones #1607.
  • GafferImageUI
    • Added ImageGadget class.
  • PlugLayout improvements
    • Added support for “layout:divider” metadata - this replaces the old “divider” metadata.
    • Added support for multiple layouts, using a different metadata prefix for each layout.
    • Added support for creating partial layouts, using a new rootSection constructor argument.
  • Toolbar improvements
    • Toolbars can now be defined for all edges, not just the top of frame (#1592).
    • StandardNodeToolbar has a new constructor argument to choose which edge to create the toolbar for. A new “toolbarLayout:section” metadata value chooses which toolbar plugs belong in, with values of “Top”, “Bottom”, “Left” and “Right” (#1592).
  • GLWidget
    • Improved overlay mechanism. Overlays may be queried and removed as well as set. Container overlays are transparent to mouse events in areas where no child widget exists (#1592).
  • NumericPlugValueWidget
    • Added support for “fixedCharacterWidth” metadata.


  • Added GCC 5 build to Travis test setup.


  • Removed ImageView::update() virtual override.
  • Replaced GLWidget.addOverlay() method with setOverlay()/getOverlay() methods.