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# Release Notes for Nuke and Hiero 16.0v9

# Release Date

2 April 2026

# Feature Enhancements

## Timeline

- ID 586854 - Added the ability to Pythonically differentiate between user selected track items and auto selected track items. To determine within the TimelineEditor if the current selection came from Auto-selection or not.

# Bug Fixes

## 3D

- ID 154775 - Setting USD/FBX/ABC paths within Camera and Axis Nodes with Python now updates the knobs before the GUI is opened.

- ID 502496 - Camera frame rate always defaults to 24 after importing

- ID 525607 - Camera3 node renders incorrectly when changing the frame rate for alembic/abc files and using read from file

- ID 607417 - 3D Handles inaccessible after decloning nodes

- ID 611407 - pxr.Usd can now be be imported when using Nuke as a Python module.

- ID 611416 - USG_PLUGINS_PATH environment variable now handles paths containing colons

## BlinkScript

- ID 609371 - The definition of the Blink::ProgramSource copy constructor is missing

## CaraVR

- ID 605666 - C_CameraSolver node fails to match points if some Time nodes, like TimeOffset are upstream of it

## Colorspace

- ID 541715 - Fixed Nuke not loading the saved view transform for some display devices - ACES 1.3

- ID 585204 - The OCIO Display node's "view" and "display" knobs can reset when the OCIO config is reloaded

- ID 606354 - Write/OCIODisplay nodes fail to load its ocioview knob if the view does not exist in the first display space's view options

- ID 613287 - Read node colorspace in exported .nk scripts is now correct when it is set to a Transcode Images task

## Deep

- ID 407553 - DeepExpression gives a "missing temporary" error when evaluating a previous temp variable

- ID 602094 - Certain expressions can produce "underflow" errors when used in DeepExpression nodes

## Documentation

- ID 606546 - Various links are broken when viewing the Nuke Development Kit reference page online

- ID 607425 - Renamed 'nuke.removeValidateFilename' function to 'nuke.removeFilenameValidate' in the docs, reflecting the function's real name

## Exporting

- ID 607315 - Adjusting an Export Preset during the "Create Comp Special" process will open the save changes prompt twice

- ID 614234 - Fixed issue where exporting a sequence with a custom start frame could lead to incorrect results when there are linked track items or effects.

## File Formats

- ID 592045 - Visual artifacts can occur when exporting H264 MOV files from Nuke or Nuke Studio on macOS Apple Silicon hardware

- ID 612859 - Nuke now no longer loads FFMPEG versions installed for other applications on windows, it will only load the version of FFMPEG installed in the build or shipped with FileIO

## File Import

- ID 613187 - FileIO is now compatible with Hiero/HieroPlayer

## Filters

- ID 613830 - The Bokeh node crash Nuke when the Focus Region Size is above 200 and the depth channel has higher contrast

## Knobs

- ID 597820 - Nuke crashes when performance heavy calls are running and dynamic knobs are used

## MacOS

- ID 603283 - Visual artifacts can occur when rendering H.264 MOVs from certain scripts on macOS ARM builds of Nuke

## Miscellaneous

- ID 609509 - System Restarts are not interrupted when the current Nuke script has unsaved changes

## Monitor Out

- ID 614220 - When monitor out is on, undoing annotation brush strokes is now possible.

## Node

- ID 370623 - Calling `node.hasError()` on a node within a Group node will no longer return "True", even when the node has no errors.

- ID 608550 - Groups can eject their contents into the main Node Graph if the show_group_view or disable_group_view knobs are expression linked and nodes have been saved in a particular order

## Node Graph

- ID 610397 - The Keylight node errors and is missing Properties when loading Nuke scripts in Nuke Assist.

## Ocula

- ID 614677 - Ocula would crash when toggling off the GPU for O_DisparityGenerator whilst in Disparity channel on MacOS Tahoe

## Performance

- ID 503006 - Opening a project with many clips, and scrolling around in the bin, causes Nuke Studio's memory usage to increase

## Python

- ID 603173 - The Shot Manager example script does not work in Nuke Studio/Hiero 16

- ID 608871 - Nuke Studio/Hiero crashes when opening a clip in the Viewer and setting an In/Out point via Python

- ID 611328 - The filenameFilter callback and the Path Substitutions Preferences do not work as expected

- ID 612728 - Fixed crash when using Nuke Studio/Hiero to open a sequence with hiero.ui.openInTimeline() multiple times and editing the Sequences on the timeline

- ID 612843 - Adding an empty TrackItem to a VideoTrack using the Python command addTrackItem no longer crashes Nuke Studio/Hiero

## Soft Effects/Transitions

- ID 611290 - Soft Effects no longer crop the image to the sequence format

## Timeline

- ID 607979 - The Viewer Info Bar timecode stopped updating when modifying a TimeWarp soft effect. This has been fixed.

- ID 611674 - Create Special Comp export no longer errors when handles are used with Collate Shot Timings enabled in Nuke Studio.

- ID 614344 - The animation for transition curves is now preserved when copying them on the timeline.

- ID 614426 - Nuke Studio no longer crashes on save when the Comp Viewer is a floating panel, and the Sequence Viewer has been closed

## Tracker

- ID 609258 - An extra key at frame 0 is added when a Table_Knob becomes animated

## Viewer

- ID 156669 - The Playhead will go 1 frame past the Out Point/last frame when Playback Mode is set to "Stop"

## Windows

- ID 598448 - Nuke window icon/taskbar icon doesn't appear until selecting node graph - Windows

# Known Issues

## 3D

- ID 575330 - GeoCard 'Control Points' knob becomes unaligned when the type is changed from 'none'

- ID 576826 - Scanline render2 producing jagged edges in shadow

- ID 577583 - Popup scenegraph to replace existing mask rather than appending

- ID 582899 - ScanlineRender doesn't produce correct normals

- ID 584677 - GeoPointsToMesh only handles default/vertex normals

- ID 584735 - PoissonMesh and GeoPointsToMesh often hang

- ID 584997 - Snap menu's pivot-to (orientation only) affects geometry if scale knobs are not all 1

- ID 585615 - Matching expressions don't work with list based collections

- ID 587425 - Bleeding issues addressed in face mode selection

- ID 587941 - GeoConstrain Local Matrix has no effect if Specify Matrix is enabled

- ID 588710 - GeoInstance transform doesn't animate

- ID 589176 - Invalid USD hierarchies that contain nested G-Prims will cause incorrect 3D viewer rendering behaviour, these are not supported by the USD schema

- ID 590139 - GeoCard: should display the Rows/Columns when selected like the classic system

- ID 591633 - 2D Image information bar is still present in 3D viewer

- ID 593942 - USD files dropped in to node graph default to ReadGeo node being used w/ the ReadGeo node placed in wrong location in node graph

- ID 594827 - GeoPoints mat input is not labelled and is in the wrong place

- ID 603770 - PreviewSurface - displacement not visible the SLR2 render

- ID 607626 - New 3D System geometry disappears when the Viewer's display knob is set to "wireframe"

- ID 614225 - Slr1 dosen't render animated cameras if the camera node panel isn't open

## BlinkScript

- ID 584226 - When a bracket is off screen, and then scrolled to, it is not highlighted

- ID 588560 - Special Characters break the indicator

- ID 588764 - The Safety Rails feature of BlinkScripts for guarding against out-of-bounds access is not enabled on the GPUs of Intel Macs

- ID 590444 - BlinkScript Editor draws off the edge of the screen when viewing large kernels

## Contact Sheet

- ID 589639 - Comparing sequences with different resolutions scales the images in the viewer relative to their respective resolutions

- ID 590036 - Nuke crashes when Pick Mode is enabled in a Sync Session

- ID 590037 - When Contact Sheet is enabled before a Sync Review session is started, Nuke will crash

- ID 590045 - Preview players no longer have a gap between them

- ID 592114 - Clips disappear from the Contact Sheet if there are missing frames

- ID 592510 - (Only MacOS) Show Annotations toggle causes MO device to show purple

- ID 592786 - Moving a clip in the Timeline may un-highlight other clips in Pick Mode

- ID 593392 - Undoing dropping clip into empty sequence will toggle the Contact Sheet button ON

- ID 593421 - Cmd + Left Click on a track doesn't select any of the track items

- ID 593593 - Pick mode Selects Timeline Transitions

- ID 593597 - Player Cache bar does not get drawn correctly in Contact Sheet viewer

- ID 593632 - setPage, setMaximumColumnCount and setMaximumRowCount python API allows the user to set float values

- ID 593854 - Closing and Opening an Soft-effect in the properties bin changes the Contact Sheet current frame

- ID 593986 - EXRs with missing layers doesn't display a border

- ID 594210 - Shift - H Toggle Tag Filtering Hotkeys only works once in the TimelineView

- ID 594326 - Changing pages removes In and Out points for the Contact Sheet Viewer

- ID 594350 - Changing the Row/Col on the last page doesn't update correctly

- ID 594389 - Setting Tag Filtering via the python while the Contact Sheet Viewer isn't open won't display clips after creating a Contact Sheet Viewer

- ID 594564 - When a Contact Sheet Viewer is open some scopes become locked

- ID 598477 - Sequence Frame tags can't be added in Contact Sheet viewer anymore

- ID 600332 - Contact Sheet Viewer does not update on zoom

## Documentation

- ID 594582 - Preferences > Docs > documentation source is pointing to 'local' when set to 'foundry'

## Exporting

- ID 589757 - FrameServer errors that are thrown before a render starts are shown in the terminal running the Nuke process, but they don't appear in the Background Renders panel's logs tab

- ID 607314 - An Export Preset's "Timeline Write Node" option is always disabled and cannot be edited

## File Formats

- ID 596453 - Reading/Writing MXF files produces additional details in the Terminal

- ID 615848 - Some mxf files fail to load for views other than the first

## File Import

- ID 588371 - Loading files into new builds fails when having env variable set for FileIO

## Link Nodes

- ID 591095 - Primatte's colour picker shares data between linked nodes with enabled override

## MacOS

- ID 585808 - UI line width is limited to 16 pixels (macOS)

- ID 587863 - Nuke viewer capped at 60 fps (macOS)

- ID 594658 - Terminal error spits out error "Zink: Failed to get IOSurface"

- ID 594761 - Launching Nuke from the GUI icons will crash upon start-up on some Macs

- ID 598538 - The Rename Shots menu shortcut for Shift+Option+/ now requires Control to be pressed on macOS

- ID 600732 - Nuke freezes when loading a PoissonMesh node workflow from a previous Nuke version on macOS (ARM)

## Miscellaneous

- ID 587583 - (Windows) Crash using older AMD drivers. Crash with 31.0.12027.9001 on a Radeon Pro WX 7100. No crash with 31.0.21916.1002 and 31.0.21018.6011 on a Radeon Pro WX 7100, and 32.0.11027.1003 on a AMD Radeon RX6700 XT

- ID 603555 - Enabling Windows Ink prevents focus from behaving reliably

## Monitor Out

- ID 586498 - Scaling floating window stretches and squeezes the image while being resized (Windows)

- ID 593376 - Monitor Out window introduces unremovable unnecessary grey space if resized horizontally

- ID 594057 - Small blank MO Floating Window may appear when using VR

- ID 597952 - Changing knobs in the Node Graph in Nuke Studio can cause the monitor out display to flip upside down

- ID 611706 - Monitor Out does not update immediately to viewer changes (MacOS)

## Multichannel Soft Effects

- ID 576380 - Bin items show RGB channel indicator, even if they are not present

- ID 582547 - Adjusting the mask knob during playback does not result in a correct mask

## Multishot

- ID 572587 - non-group nodes root item shows as unnamed

- ID 577486 - Middle click changes the hit group

- ID 584182 - Selecting a list option on an inherited variable will change the variable type to string

- ID 584377 - The height of the Label input box is larger than elsewhere (see the same widget for editing user knobs to the right)

- ID 587036 - Disabled GSV knob is not scrollable

- ID 587589 - Cutting (CMD+X) a linked node, then cloning the parent and then pasting creates a cloned link

- ID 587593 - Copy/Cut with nothing selected results in : 'Cannot copy/cut across multiple groups' error

- ID 589109 - Nodes in an input tree of a var group should see the variables defined by it

- ID 589706 - Updating variables using python does not update value until user clicks on the Variable panel

- ID 590072 - Grouping a group with a child link node breaks link

- ID 590243 - Variable Switch - Thumbnails will error temporarily before resolving with networked files

- ID 591907 - Typo in Create Variant popup

- ID 591987 - Variant switches when trying to adjust value of overridden knob for a first time

- ID 592017 - Unable to remove "Divider Line" knobs from the panel

- ID 593887 - Unnamed (default) GSV set not found for nested group path (python only)

- ID 595335 - Link node override knob requires hover away to reveal selection

- ID 596302 - Show Group View knob not updating the UI with a TCL expression

- ID 596451 - Text node is not evaluating recursive variables

- ID 596622 - Reinstate the X icon properly to discard variable from panel

- ID 598967 - Undo removal of first entry on favorites panel not working

- ID 599117 - Creating a Variable Set via Python referring to a non-existent path will create the set on the root

- ID 599892 - Variable switch will retain the overlay data from contact sheet despite switching inputs

- ID 601345 - Undo / Redo will not remove first enabled favorited Variable

## Node

- ID 606845 - LensDistortion lines are inconsistently snapped to the origin if the mouse is moved

- ID 616081 - Expression node causing a crash on close

## Node Graph

- ID 595321 - (MacOS Only) Postage Stamp image gets premults if macOS HDR is enabled

- ID 602143 - Middle clicking on the node graph with a tablet pen does not zoom in/out if Windows Ink is enabled

- ID 605043 - Nuke crashes on macOS Apple Silicon when Baking Groups from the PointCloudGenerator or PointsGenerator nodes

## OpenAssetIO

- ID 580110 - Knob values inherited from an asset are no longer highlighted after undoing a user change

- ID 582341 - Read nodes using entity references with GSVs does not update frame ranges on the UI

- ID 586349 - Knob values don't update on restart or clear caches

- ID 586454 - Terminal warnings if OPENASSETIO_DEFAULT_CONFIG is set

## Project

- ID 597160 - Saving unicode control characters (0001 to 001F) in a .hrox stops you being able to open the project

- ID 616673 - Loading a .hrox project into a workspace where the timeline panel ID is greater than one causes the timeline to open in a floating panel

## Python

- ID 596598 - Nuke crashes when trying to add a QtWebEngineWidgets.QWebEngineView to a Nuke panel

- ID 610998 - Nuke crashes when calling execute on a Curve Tool from a Tab menu custom action.

- ID 611428 - PySide widgets registered as Panels cannot be reshown after they have been closed

- ID 613137 - Node.dependencies() returns an empty list on its first call in some scripts in Terminal mode

## Quick Export

- ID 589137 - Exporting shot directly from timeline will show both Quick and Custom export tabs

- ID 590316 - Incorrect pixel aspect ratio when exporting to PAL / NTSC

- ID 591377 - Cancelling Quick Export is not deleting a file (Windows only)

- ID 592312 - Quick export crashes if there is a offline media at the end

- ID 593290 - Overwriting source file with Quick Export will crash nuke

- ID 593293 - Crash when layer is chosen in viewer

- ID 594146 - Issues when exporting sequence with audio track longer then video

- ID 594590 - Encoders are flushed prematurely in the export process

- ID 594727 - Grey out Audio knobs when 'Include audio' is unchecked

- ID 595141 - Quick Export - crash when a rendering a section that has just audio at the end

- ID 598754 - Quick export will not export right side view

## SyncReview

- ID 613681 - Nuke Studio no longer crashes when creating a contact sheet in a sync review session

## Timeline

- ID 580026 - Active playhead selection prevents use of select track tool for other shots in the sequence

- ID 580654 - Hard selecting an already soft-selected item with select or effect selector tool doesn't update the UI

- ID 582613 - Shift + Dragging on an empty spot of the timeline causes the current soft selection to go into a hard selection

- ID 590942 - When a shot has a number of soft effects, the user is unable to resize the thumbnail of a shot after re-opening a project

- ID 593981 - Preview players appear empty before the images load

- ID 612526 - Hiero/Nuke Studio crashes when version scanning and there is a Timeline incompatible Nuke script with the same name as the files, when the parent directory has a version

- ID 613515 - Adding a Color Lookup soft-effect no longer causes the Viewer to turn grey

## Tracker

- ID 612861 - The Tracker's pattern and search window handles do not consistently update in the Viewer while Tracking on macOS

## UI

- ID 594565 - Maximising a minimised Nuke window doesn't draw the DAG and Viewers in the Animation

- ID 615769 - The screenHeight of nodes is now 2 pixels smaller than in previous releases [Linux only]

## VFX Reference Platform CY2024

- ID 586456 - AVP renderer doesn't work in Nuke

- ID 587691 - Moving mouse in and out of Curve Editor and Dope Sheet widgets causes the playheads to update - Timeline

## Viewer

- ID 580551 - Paused image has a 1px blur when zoomed in at around 180-220%

- ID 594100 - Changing color channels using hotkeys between Node Graph Viewer and Timeline Viewer is broken

# Qualified Operating Systems

- Nuke 15.0 and later support Apple's silicon hardware.

- macOS Sonoma (14.x), or macOS Sequoia (15.x)

  For more information on Foundry products and supported macOS versions, see Foundry Knowledge Base article Q100592.

- Windows 10 (64-bit) or Windows 11 (64-bit)

- Linux Rocky 9.0 (64-bit)

  Nuke requires libnuma to run under Linux distributions, the library is required by the Nablet H264 Codec SDK.

  The currently supported version of VFX Reference Platform includes library versions that are only compatible with Rocky 9.0.

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. See the Release notes for full details of requirements for GPU acceleration based on your Nuke version.

### NVIDIA

An NVIDIA GPU with graphics drivers capable of running CUDA 11.8, or above. A list of the compute capabilities of NVIDIA GPUs is available at https://developer.nvidia.com/cuda-gpus

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 11.8, or above. On Windows and Linux, CUDA graphics drivers are bundled with the regular drivers for your NVIDIA GPU. Driver versions 522.06 (Windows) and 520.61.05 (Linux), or above are required. See https://www.nvidia.com/Download/Find.aspx for more information on compatible drivers.

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

### AMD

Bitwise 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:

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

  - AMD Radeon PRO W7900

  - AMD Radeon PRO W6600

  - AMD Radeon PRO W6800

  - AMD Radeon Pro W5700

  - AMD Radeon RX 6800 XT

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

- On Mac, integrated AMD GPUs are supported on the following Intel CPU Macs:

  - Any late 2013 Mac Pro onward (including 2019 Mac Pro),
  - Mid-2015 MacBook Pros onward, and
  - Late 2017 iMac Pros onward.

  All supported Mac Pros include a multi-GPU support option, where applicable. Bitwise equality between GPU and CPU holds in most cases, but for some operations, there are limitations to the accuracy possible with this configuration.

  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.

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.

## GPU Requirements for the Machine Learning Toolset

Training using the CopyCat node requires an NVIDIA GPU, with compute capability 3.5 or above; or MacOS Apple silicon integrated GPUs.

If an appropriate GPU is not available, Inference and other machine learning plug-ins can run on the CPU with significantly degraded performance.

## Apple M Series

Native support for Apple silicon hardware began with Nuke 15.0 and later versions. The following machines has been tested.

- Mac Pro
- Mac Studio
- Mac Mini
- MacBook Pro

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

Note: For Nuke 14.1 and earlier, Nuke is supported under Rosetta emulation on Apple silicon hardware. For the latest and most detailed information on GPU acceleration requirements for your specific Nuke version, always refer to the official release notes. From
Nuke 17.1 Intel Macs are no longer supported.

# Developer Notes

As Nuke 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 | 14.0v1 to 14.0v2 | API and ABI |  |
Point | 14.0v1 to 14.1v1 | API | ⬤ |
Major | 14.0v1 to 15.0v1 | - | ⬤ | ⬤

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 Nuke's node toolbar, contains all the current node class names and is located in <install_directory>/plugins/nukescripts/ for reference.

As an example, between Nuke 13 and Nuke 14, the Axis node Class() changed from Axis3 to Axis4. In the toolbars.py file for the two releases, the entries for the Axis node appear as follows:

    m3Dclassic.addCommand(
        "Axis",
        "nuke.createNode(\"Axis3\")",
        icon="Axis.png",
        tag=MenuItemTag.Classic,
        node="Axis3",
        tagTarget=MenuItemTagTargetFlag.TabMenu)

    m3D.addCommand(
        "Axis",
        "nuke.createNode(\"Axis4\")",
        icon="Axis_3D.png",
        tag=MenuItemTag.Beta, node="Axis4")