Added a new VEX function chrampderiv for evaluating the derivative of a ramp with respect to position.

Added a blendshape deformer for agents. Agents can now store a list o channel values (defined by the rig) in addition to the joint transfor and these channel values can be used to drive the blendshapes. The Agent ROP / SOP now support importing blendshapes from Houdini ri FBX files, and agent blendshapes can exported to USD and viewed in th viewport.

Add ability to drag and drop to the light linker from the scene graph tree.

Fixed bug where light handle would scale with object. Bounding box now takes into account light scale. Added hotkeys for lookat/spotlight to light and camera lop states.

The SOP TOP (the TOP Network node within the SOP context) has been renamed to TOP Geometry. In addition, a regular TOP Network manager has been added to SOPs. Both methods of interacting with TOPs are now available from within SOPs.

Added a new VEX function chrampderiv for evaluating the derivative of a ramp with respect to position.

Fixed bug where restoring stashed views did not properly flag the viewport as having a window override.

Unity plugin:

• Added support for uploading quad topology input meshes without convertingto triangles.
• Added optional destination path to export prefab to inHEU_HoudiniAsset.BakeToNewPrefab.

Bumped up Houdini's Ptex library to 2.1.33 to match the CY2019 specification of the VFX Reference Platform.

Renamed the ROP USD LOP (rop_usd) and ROP USD Render LOP (rop_usdrender) to USD ROP (usd_rop) and USD Render ROP (usdrender_rop). Aliases added for compatibility with older hip files.

Added new options to Edit -> Preferences -> Lighting to specify a default scene graph location for new lights, and default meters per unit and up axis values to set on layers where values have not been exlicitly set.

Changed the SOP Create and Simulation Proxy nodes to ensure that they don't create any new USD layers internally.

Render settings from the current render settings prim are now passed to the renderer in the LOP viewer. Clicking the render settings buttons on the right toolbar now starts a render, rather than requiring something else to redraw the viewer.

Fixed issues where the houdini_get_default_install_dir() function in Houdini's CMake module did not necessarily match $HOUDINI_USER_PREF_DIR.

Bumped up Houdini's NumPy version to 1.14.6 to match the CY2019 specification of the VFX Reference Platform.

The Extract File node will now report its output files with a tag detected from the file extension rather than resorting to the generic "file" tag.

The Modify Point Instancer LOP no longer creates a new USD layer. Instead, it modifies the active layer of the input LOP.

Fixed bug where changing the Apply Zoom to Background display option did not redraw the viewport.

Fixed the For Each and Merge LOP "Flatten into active layer" modes. These modes were making the input active layer the strongest opinion, when it should have been the weakest.

Update USD library to fix some crashes occurring during viewport updates.

hou.UIEventDevice.keyString() errors with Shift+DEL

• Fixed hou.UIEventDevice.keyString to return proper strings.
• The format of the returned string is different than the previous one.Existing python states would need to be updated according to the newformat. Check out the hou.UIEventDevice.keyString documentation fordetails.

Fixed light LOP rerender on mouse entry into viewport. Fixed accidental removal of intensity modifier in light state.

Fix several LOP HDA parameters to correctly tag them as USD paths.

Fixes bug where hkey wouldn't properly update the connected license server.

Unity plugin:

• Fixed baked terrain not getting layers.
• Added support for specifying a string parameter to be treated as anasset path parameter in Unity, by adding tag named "heuassetpath" toparameter. This allows to drag & drop assets or choose from assetlibrary in Unity.
• Now copying overridden collider mesh on instance over to the bakedinstance.
• Now returning the newly created prefab or gameobject when baking.