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# Release Notes for Nuke and Hiero 16.0v5

# Release Date

2 September 2025

# Feature Enhancements

## Timeline

- ID 152675 - Add ability to suppress the autosave dialog prompt when opening projects via Python

# Bug Fixes

## File Format and SDK updates

- ID 524274 - Nuke Studio does not apply colour transforms correctly to ARRI Alexa 35 footage when changing the arri_colorspace knob

## Rotopaint

- ID 599860 - Splines created with "Duplicate and join" do not always update the SplineWarp preview in the Viewer.

- ID 599862 - Nuke crashes when switching between, and editing, bezier shapes in the SplineWarp node, after using the "Duplicate and join" option.

## 3D

- ID 585906 - Nuke crashes when zooming the Viewer in/out if a ScanlineRender node uses filtering options with transparent images outputs as Deep data and is merged with another ScanlineRender

- ID 599185 - Issues selecting rotation axes handles

- ID 600411 - Nuke crashes when viewing a Scene node after attaching PositionToPoints and Card nodes and zooming/rotating/panning in the 3D Viewer

- ID 601224 - The Camera node exports default values to USD if these are different to the USD Camera schema defaults.

- ID 602549 - Issues rotating 3D viewer on Windows

- ID 603260 - GeoExport is available in Nuke Non-Commercial

## CaraVR

- ID 476365 - C_Stitcher now renders correctly with "Use GPU if available" enabled

## Colorspace

- ID 405361 - OCIOCDLTransform Soft Effect errors when exporting grade as .cc from Hiero

- ID 515401 - Setting defaultViewingLUT to OCIO LUTs no longer loads the OCIO luts into the Viewer Process

- ID 525759 - Reload button on OCIOFileTransform and OCIOLookTransform no longer works

- ID 602724 - Changing the green and blue values on the OCIOCDLTransform soft effect's slope, offset and power knobs does not update the Viewer

## Documentation

- ID 552407 - nukescripts.renderdialog is not mentioned in Nuke's Python documentation

- ID 601180 - The Docs home page is given when selecting the Documentation icon for VariableSwitch and VariableGroup nodes in Nuke

## File Export

- ID 598378 - MXF files exported at certain resolutions produce skewed images

## File Import

- ID 587586 - Exporting an ARRI MXF file as an EXR sequence results in incorrect arri/optics/lens_state metadata values

- ID 591666 - TAddTimeCode node doesn't use get FPS from metadata when setting the start time code, using 24 fps instead

## Indie

- ID 485729 - Nuke Indie doesn't load Indie gizmos (gzind) when using Update in the Tab menu

## Installation and Licensing

- ID 547412 - A message prompt is given when adding the /passive command while using uninstaller.bat on the command line

## Live Groups

- ID 580048 - LiveGroups are not considered modified when an exposed knob is set to the knob's default value

- ID 595010 - LiveGroup default path is attempting to write to the Nuke directory

- ID 599232 - Nuke crashes when opening a .nk in a LiveGroup

## Miscellaneous

- ID 500479 - AnalyticsUploader (Usage Statistics) doesn't timeout when it can resolve the DNS but doesn't receive a response

- ID 519790 - SmartVector toolset example Nuke script errors when opening

## Multishot

- ID 595171 - Using the Python API to set multiple GSVs from a dictionary will now retain the original ordering of the variables instead of sorting them alphabetically

- ID 597307 - GSVs do not de-serialize correctly if they contain backslash characters

- ID 597503 - GSVs in a Read node's file-path can fail to evaluate when the Nuke script is Saved/Autosaved

- ID 599507 - Knobs containing GSVs stop evaluating via Python if any GSVs are created, changed, or removed

## Node

- ID 494712 - The Swap Input/Output button on SphericalTransform node functions incorrectly

- ID 591134 - HTML/ UTF-8 character sets in the text node no longer work

## Node Graph

- ID 573749 - The Switch Pipes will automatically highlight the correct View input without the need to refresh

- ID 599802 - Nuke crashes when opening scripts containing Deep and ModifyMetadata nodes, and Top-Down Rendering is enabled

## Python

- ID 569271 - hiero.core.Timecode.stringToTime() Hiero Python documentation is incorrect

- ID 602091 - The hiero.ui.Viewer.goToTrackItemMiddle() method does not work and raises an OverflowError

## Spreadsheet

- ID 604726 - The Spreadsheet View can become unresponsive when filtering if many Track Items are selected on the Timeline

## Timeline

- ID 604193 - The Playhead can appear in the Timeline when no Sequences are active, and will crash Nuke Studio if it is moved

- ID 604194 - Nuke Studio can crash when the Viewer's Compare mode is active and "Drop Clips" is undone

## Tooltip

- ID 604344 - The Defocus node's method knob has a typo in its tooltip

## Windows

- ID 600301 - Wacom tablet pressure is not working in Nuke on Windows

## ZDefocus

- ID 355791 - Specific ZDefocus knob values cause Pixel extension on footage

# 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 579729 - Framehold not working when connected to the material input of GeoCard/GeoCube

- ID 581736 - GeoXform in edit mode sets new nodes created under it as children of the modified node

- ID 581737 - Switching GeoXform node from edit mode to create mode duplicates the node connected to it in the viewer

- 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 587190 - Clipping plane disrupts geo in viewer when looking through camera

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

- ID 590142 - GeoCard: double clicking GeoCard node should show the node as selected in the 3D viewer

- ID 590890 - Animated snap takes a long time if there are a lot of nodes, even if they are not connected

- 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 597476 - Write node render time increases significantly when viewing a 3d scene while rendering

- ID 599296 - RotoPaint nodes contributing to textures being applied with a GeoUVProject are not being rendered via ScanlineRender2

- ID 603349 - Camera4 and Axis4 nodes with expression driven values are not exported correctly by the GeoExport node

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

## 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

## Colorspace

- ID 549833 - Nuke Studio displays the incorrect OCIO config version in the Project Settings when the OCIO environment variable is set

## 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 592550 - Monitor Out SDI and NDI not updating on Contact Sheet Viewer playback

- 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

## 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

## 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

## 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 597057 - Edit options on the Root row should be disallowed

- ID 597058 - Removing all Variables in a Var set will remove the Variable set

- 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 Graph

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

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

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

## 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

## Python

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

- ID 605459 - Tag metadata keys can no longer be hidden from the UI by omitting the "tag." prefix

## 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 591048 - Ranges is unavailable and will default to whole Sequence

- ID 591049 - Include Annotations is unavailable

- 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

## 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

## UI

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

## 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.

### 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.

# 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")