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# Release Notes for Nuke and Hiero 12.0v7

# Release Date

30 June 2020

Warning: As a result of the current COVID-19 lockdown here in the UK, Foundry is unfortunately not able to perform all of its usual QA tests for Nuke's monitor output, including VR headset support. As such, there may be some reduction in related functionality in this release.

# Qualified Operating Systems

• macOS High Sierra (10.13) or macOS Mojave (10.14)

• Windows 7 or Windows 10 (64-bit)

• CentOS 7.4 (64-bit), or later

Note: The VFX Platform 2019 upgrade includes library versions that are only compatible with CentOS 7.4, or later. Nuke 12 is qualified on the Centos 7.4, 7.5, and 7.6 distributions.

Other operating systems may work, but have not been fully tested.

## Requirements for Nuke's GPU Acceleration

If you want to enable Nuke to calculate certain nodes using the GPU, there are some additional requirements.

#### NVIDIA

An NVIDIA GPU with compute capability 3.0 (Kepler) or above. A list of the compute capabilities of NVIDIA GPUs is available at https://developer.nvidia.com/cuda-gpus

Note: The compute capability is a property of the GPU hardware and can't be altered by a software update.

With graphics drivers capable of running CUDA 10.1 or above. On Windows and Linux, CUDA graphics drivers are bundled with the regular drivers for your NVIDIA GPU. Driver versions 418.96 (Windows) and 418.39 (Linux), or above are required. See https://www.nvidia.com/Download/Find.aspx for more information.

Note: We recommend using the latest graphics drivers, where possible, regardless of operating system.

#### AMD

Note: Bit-wise equality between GPU and CPU holds in most cases, but for some operations there are limitations to the accuracy possible with this configuration.

• On Windows and Linux, an AMD GPU from the following list:

Note: Other AMD GPUs may work, but have not been fully tested.

• Radeon™ RX 480

• Radeon™ Pro WX 7100

• Radeon™ Pro WX 9100

• Radeon™ Pro SSG

• Radeon™ Pro WX 8200

Note: For information on the recommended driver for each GPU, see https://www.amd.com/en/support

• On Mac, AMD GPUs are supported on any late 2013 Mac Pro, mid 2015 MacBook Pros onward, and late 2017 iMac Pros.

Warning: Although AMD GPUs are enabled on other Mac models, they are not officially supported and used at your own risk.

#### Multi-GPU Processing

Nuke's GPU support includes an Enable multi-GPU support option. When enabled in the preferences, GPU processing is shared between the available GPUs for extra processing speed.

Note: Multi-GPU processing is only available for identical GPUs in the same machine. For example, two NVIDIA GeForce GTX 1080s or two AMD Radeon™ Pro WX 9100s.

# New Features

There are no new features in this release.

# Feature Enhancements

There are no feature enhancements in this release.

# Bug Fixes

• ID 303603 - Window only: Calling nuke.executeInMainThreadWithResult() in the Script Editor displayed a SystemError: "error return without exception set" message.

• ID 399154 - Versioning up or down with corrupted or incomplete versions available in the stack caused the application to crash.

• ID 402548 - NDK: Mouse-over events called deepEngine() unnecessarily.

• ID 405258 - ReadGeo: Dragging an .abc or .fbx file into the Node Graph created a ReadGeo node, rather than a ReadGeo2 node.

• ID 405270 - Python: Moving a soft effect to a different frame Pythonically marked the effect as invalid.

• ID 409405 - Versioning up a clip in the same directory as a Nuke script with the same name caused the application to crash.

• ID 410467 - Python: PyScript_Knob keyword arguments were not called correctly within the function.

• ID 413861 - Export: Re-exporting certain comps did not work as expected.

• ID 416120 - LiveGroups: The Node tab Copy to group button did not work as expected for LiveGroups with custom tile colors.

• ID 416121 - LiveGroups: The Node tab Copy to group button did not copy custom user knobs to the Group.

• ID 419010 - Timeline Editing: Enabling and disabling track visibility was slow compared to older versions of Nuke Studio.

• ID 420675 - Linux only: The RotoPaint ripple edit outline in the Viewer did not draw correctly.

• ID 420676 - Python: The KnobChanged callback did not update Colorspace knobs correctly.

• ID 431332 - NDK: libstudio.so exported boost_python symbols incorrectly.

• ID 431656 - Python: Moving a soft effect to a different frame Pythonically caused Nuke Studio to crash.

• ID 438743 - Soft Effects: Disabling and then enabling certain OCIOFileTransform effects caused Nuke Studio to become unresponsive.

• ID 438788 - Read/Write: Artifacts occasionally displayed in the Viewer and renders for images that were more than 8192 pixels wide.

# New Known Issues Specific to Nuke 12.0

This section covers new known issues and gives workarounds for them, where appropriate.

Note: NVIDIA GPUs with compute capability of 3.0 (Kepler) cannot process .r3d files due to a known issue in the R3D SDK preventing decoding and debayering. Nuke defaults to CPU processing when reading .r3d files with these cards installed. A list of the compute capabilities of NVIDIA GPUs is available at: www.nvidia.co.uk/object/cuda_gpus_uk.html

• ID 437042 - Windows only: Nuke no longer registers Nuke scripts with an associated program when installed.
As a workaround, install Nuke 11.3v6 to associate scripts, then change the associated file by right-clicking the .nk script and navigating to: Open With... > More Apps > look for another app on this PC to find the required version of Nuke.

• ID 435284 - Python: Calling nuke.message() or nuke.alert() doesn't wait or pause the main thread as expected.
As a workaround, use QtWidgets:
from PySide2 import QtWidgets
QtWidgets.QMessageBox(QtWidgets.QMessageBox.Information, "Nuke", "Test Message", QtWidgets.QMessageBox.Ok).exec_()

• ID 434043 - Python: The pyside2-rcc component is currently missing from the bundle.

• ID 432839 - Script Editor: Selecting text in the Script Editor output pane occasionally causes Nuke to crash.

• ID 431980 - macOS only: Selecting a shot on the timeline stops the execution of Python in the Script Editor using the Cmd+Enter keyboard shortcut.

• ID 429533 - Windows only: The goofy_title.txt file is missing from the Nuke plugins directory.
As a workaround, copy the file from a legacy version of Nuke to:
<install_directory>\plugins
For example:
C:\Program Files\Nuke11.3v6\plugins

• ID 429293 - Launching HieroPlayer with only Nuke, NukeX, and Nuke Studio local licenses displays the Licensing dialog and causes HieroPlayer to crash on exit.

• ID 429245 - UI: Using / (slashes) or spaces in path substitutions in the Preferences pads table rows incorrectly, making the UI unusable.

• ID 428360 - DeepMerge: Holdout does not work as expected on volumetric data samples.

• ID 427913 - Monitor Output: Looping a sequence on a monitor out device causes playback to skip frames.

• ID 425392 - NDK: OpenColorIO 1.1.1 in Nuke 12.0 leaks symbols from a statically linked library.

• ID 425201 - Python: Using lambda functions inside a PySide2/Qt Signal currently returns a boolean rather than the argument passed.

• ID 423515 - Windows only: Launching Nuke in --safe mode causes the application to become inaccessible, even though it is running.

• ID 422181 - macOS only: Moving the Curve Editor panel to second monitor displays a blank image.

• ID 420671 - macOS only: Monitor output from AJA cards at 4K / 10-bit causes the playhead to redraw incorrectly and lag behind playback.

• ID 420592 - C_CameraSolver: Clicking Solve occasionally produces different results before and after saving a script.

• ID 420354 - Workspaces: Node panels do not update correctly if the Properties panel is open on a second monitor.

• ID 420326 - Viewers: Using an OCIO config other than nuke-default with use GPU for Viewer enabled stops the Viewer clip_warning working as expected.

• ID 419046 - NDK Documentation: These is currently very little documentation on the functionality of the Deep Op base classes, specifically DeepOnlyOp, DeepFilterOp, and DeepPixelOp.

• ID 418385 - GridWarpTracker: Clicking through various frames on the timeline with a GridWarpTracker active in the Viewer does not update the grid correctly.
As a workaround, click play on the timeline to update the grid to the correct position.

• ID 418369 - C_Blur: The transition between values using Bilinear filtering is not smooth.

• ID 418303 - macOS only: Colorspace controls in the node Properties panel are sized incorrectly.

• ID 417443 - macOS only: HieroPlayer UI scaling does not work as expected.

• ID 414939 - macOS only: The dock does not always display the correct icon for the Nuke product launched.

• ID 414482 - macOS only: The Nuke Studio and NukeX launch shortcuts do not work as expected.
As a workaround, launch the required application from the command line. See the Nuke Online Help for more details.

• ID 410829 - Linux only: Creating nodes Pythonically from the OS command line causes the Python interpreter to crash.

• ID 410015 - Windows only: Monitor output from AJA Kona 4 cards using HDMI is split incorrectly in to four images on the monitor.

• ID 409910 - macOS only: Monitor output playback is not smooth towards the end of certain clips using AJA cards.

• ID 409909 - macOS only: Switching between monitor output devices in Nuke Studio occasionally causes the device selection dropdown to disappear.

• ID 407847 - Linux only: CaraVR output through an Oculus CV1 headset is unreliable when looking around the scene.

• ID 405333 - Export: Missing frame errors are occasionally displayed after the error is corrected, though the export renders correctly.

• ID 404189 - Bin View: Disparity channels are not displayed consistently in clip thumbnails.

• ID 403804 - Linux only: Switching resolution on the HTC Vive HMD occasionally displays black output in the headset. As a workaround, update the Viewer by changing frame or press F5 to refresh the headset output.

• ID 403337 - High DPI: Changing the primary monitor causes the UI to update incorrectly.

• ID 403210 - High DPI: Swapping between fullscreen and regular workspaces does not retain the UI scale.

• ID 402564 - Windows only: The installer currently overwrites the default install directory without warning.

• ID 401946 - High DPI: F_WireRemoval on-screen controls are drawn incorrectly.

• ID 400506 - High DPI: F_Align's bounding box outline is thinner and smaller than in older versions of Nuke.

• ID 400445 - High DPI: F_WireRemoval's controls are smaller and the icon is different to older versions of Nuke.

• ID 400389 - High DPI: The F_Steadiness node controls are thinner than in older versions of Nuke.

• ID 400268 - High DPI: F_Align's controls and outlines are smaller and thinner than in older versions of Nuke.

• ID 399232 - Python: Declaring TimeBase(None) causes Nuke to crash.

• ID 399228 - High DPI: Moving Nuke between monitors with different scaling ratios causes GLWidgets to draw incorrectly.

• ID 398978 - GridWarpTracker: Selecting grids Pythonically does not update the node Properties correctly.

• ID 398213 - macOS only: Switching to a Retina display and then drag-selecting nodes in the Node Graph causes the interface to flicker.

• ID 397516 - DNxHR: Certain .mov file transfer_function metadata in Nuke does not match when compared to nclc atom.

• ID 395100 - macOS only: Certain .exr clips containing extra metadata are read more slowly than in previous releases of Nuke.

• ID 394789 - macOS only: Scrolling in properties panels that contain a curve widget, such as ColorCorrect, occasionally causes the interface to flicker.

• ID 393373 - GridWarpTracker: Dragging multiple grid vertices and holding Shift does not snap points to the grid.

• ID 393052 - macOS only: Tooltips occasionally don't display correctly.

• ID 392223 - macOS only: The installer window is slightly blurred.
As a workaround, resize the window to improve the resolution.

• ID 392156 - GridWarp: Existing grid keyframes are not displayed in the Dope Sheet.

• ID 392143 - GridWarpTracker: Moving keyframes created by autokey in the Curve Editor or Dope Sheet adds another keyframe at the current frame.

• ID 392127 - GridWarpTracker: The magnifying window displayed over grid vertices during mouse-over changes position if you press Ctrl/Cmd.

• ID 390551 - GridWarpTracker: Enabling Invert stops the preview working as expected.

• ID 389356 - GridWarpTracker: Attempting to use GridWarpTracker in vanilla Nuke only displays a license error once.

• ID 388836 - GridWarpTracker: Toggling grid visibility does not affect the transform widget.

• ID 387397 - Legacy scripts containing Vectorfield or Colorspace nodes set to HDR2084 do not display complete error messages on load. The complete error message should read: Invalid LUT selected: HDR2084

• ID 386719 - Windows only: AJA Kona 4 12-bit dual link 1080p50a, 1080p59.94a, and 1080p60a output is incorrect.

• ID 386517 - Timeline Playback: Clicking the skip to start button and clearing the playback cache simultaneously causes Nuke Studio to crash.

• ID 383542 - GridWarpTracker: Adding a NoOp downstream of a GridWarpTracker with linked knobs occasionally causes Nuke to crash.

• ID 268879 - LensDistortion: The Viewer overlay doesn't match the source when redistortion is applied.

# Developer Notes

As Hiero develops, we sometimes have to make changes to the API and ABI under the hood. We try to keep these changes to a minimum and only for certain releases, but from time to time API and ABI compatibility is not guaranteed. See the following table for the situations when you may have to recompile your plug-ins and/or make changes to the source code.

Release Type | Example | Compatibility | Recompile | Rewrite
--- | --- | --- | --- | ---
Version | 12.0v1 to 12.0v2 | API and ABI |  |
Point | 12.0v1 to 12.1v1 | API |  |
Major | 12.0v1 to 13.0v1 | - |  |

Additionally, node Class() names occasionally change between major releases. While these changes do not affect legacy scripts, you may not get the results you were expecting if a node class has been modified. The toolbars.py file, used to create Hiero's node toolbar, contains all the current node class names and is located in <install_directory>/plugins/nukescripts/ for reference.
As an example, between Hiero 9 and Hiero 10, the CameraShake node Class() changed from CameraShake2 to CameraShake3. In the toolbars.py file for the two releases, the entries for the CameraShake node appear as follows:
m.addCommand("CameraShake", "nuke.createNode(\"CameraShake2\")", icon="CameraShake.png")
m.addCommand("CameraShake", "nuke.createNode(\"CameraShake3\")", icon="CameraShake.png")