0.27.0.0

Apps

• Screengrab (#1793, #1559)
  • Added arguments for Viewer and NodeGraph framing
  • Added arguments for Viewer and SceneHiearchy expansion and selection
  • Added argument for grabbing a single plug from the NodeEditor

Scene

• Fixed SubTree to error when an invalid root is entered (#1786, #1790).
• Added filter input to Set, to define additional paths to add/remove.

Arnold

• Added ArnoldMeshLight node (#1787)
• Added ArnoldDisplacement node (#1776)
• Added subdivision attributes to ArnoldAttributes (#1776)
• ArnoldOptions (#1788)
  • Added total depth and transparency depth/threshold plugs
• Fixed warnings about unhandled light parameters
• Fixed crashes/errors caused by multiple cameras and a threading bug (#1785)
• Fixed bogus warning about “ai:log:filename” option.

OSL

• Expression (#1791, #1789)
  • Fixed string comparison bug
  • Fixed bugs when plug names share a common prefix
  • Fixed mistaken assignments
• Added support for spline parameters in shaders (#1782)
• Fixed reload button on shader UI

Documenation

• Added basic lighting and rendering tutorial (#1793).

Build

• Fixed debug builds (#1781)
• Added debug builds to Travis tests (#1781)
• Fixed clang compilation error in Serialisation.cpp

API

• Made FilteredSceneProcessor subclassable in Python.

Breaking Changes

• Rederived Set from FilteredSceneProcessor.
• Changed LightVisualiser API
  • Added attributeName argument to visualise() virtual method.
  • Added attributeName argument to registerLightVisualiser() factory method.
• Changed StandardLightVisualiser metadata prefix convention from “light:renderer:shaderName” to “renderer:light:shaderName”, to match the ordering of the data as it appears in the scene module (attributeName:shaderName).
• Light nodes now output IECore::Shader objects rather than IECore::Lights