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# Release Notes for Nuke and Hiero 16.1v3

# Release Date

09 June 2026

# Feature Enhancements

## File Format and SDK updates

- ID 610250 - Support for Sony SMDK 4.26.1 metadata is now available

## Exporting

- ID 224896 - The BurnIn soft effect now supports arbitrary text and TCL expressions as on the Text node

## OTIO

- ID 589646 - Added support for importing OTIO files containing Markers with empty names

# Bug Fixes

## 3D

- ID 563770 - GeoExport correctly exports transform values to Alembic files

- ID 590244 - Not all knob values are preserved when importing New 3D System Lights

- ID 612583 - Viewer performance improvements while manipulating Gaussian Splats and other 3D nodes.

- ID 617102 - The GeoBindMaterial node can wrongly raise "stronger binding" warnings

- ID 618138 - Performance issues with large geometry when using GeoMerge nodes

- ID 619079 - Setting the viewer_world_coordinate_system Preference knob to "Z-Up" produces an incorrect result

- ID 619270 - The vertical Window Translate is incorrect for Cameras imported from third-party DCCs

## Annotations

- ID 610969 - Creating and editing annotations via Python carries over to the client in a sync session

- ID 611605 - Clicking out of a Text Annotation no longer leaves you with a broken Select Tool.

## BlinkScript

- ID 607046 - Blinkscript doesn't initially update values from a look controlled world matrix expression link

- ID 611086 - The ParticleColorByAge node errors when viewed in Nuke

- ID 611227 - Blinkscript Find and Replace highlight makes the text unreadable

## Disk Cache

- ID 618298 - Fix timeline disk caching multiple sequences at the same time causes Nuke Studio to hang

## Documentation

- ID 608768 - The Callbacks documentation indicates that knobChanged events only occur when the Properties are open

## Exporting

- ID 616372 - When opening the Export panel, the last tab used - 'Custom' or 'Quick' - is automatically selected.

## File Formats

- ID 615898 - The alpha channel is always solid white when a MOV is exported using ProRes 4:4:4:4 codecs

## Knobs

- ID 616942 - Nuke crashes when performance heavy calls are running and dynamic knobs are used

## MacOS

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

## Miscellaneous

- ID 614813 - Tracker nodes returned "Reading keyframe previews…" messages when rendering via Terminal mode

- ID 617604 - Nuke no longer crashes when closing the flipbook window after switching focus

## Monitor Out

- ID 595100 - Fixed: The Monitor Out floating window incorrectly displays premultiplied images.

- ID 595101 - Monitor Out does not correctly retain its background setting. Now fixed.

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

- ID 616935 - Non-HDR BMD cards don't output an image

## Node

- ID 154472 - Deleting a Group's internal Input nodes doesn't remove the inputs from the node

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

## Node Graph

- ID 604598 - Navigation in Nuke's Node Graph is slow in large scripts with many nodes on screen

## 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 617765 - The sendToViewerA() function does not consistently update hiero.ui.activeSequence()

## Timeline

- ID 608144 - Double-clicking a comp container in the timeline, in workspaces without the Node Graph open, does not make the Node Graph and Viewer floating panels, and instead switches to the Compositing Workspace

- ID 617697 - Dissolve transition does not carry over animation to comp node. Now fixed.

- ID 619525 - Hiero only registers objects from the first file when duplicate filenames exist in startup directories

## Tracker

- ID 614096 - The CameraTracker can produce different results when solved repeatedly

## Viewer

- ID 474886 - Cancelling a Flipbook render doesn't allow the already captured frames to be viewed, and an error is returned

- ID 588634 - Timeline Viewers can display incorrect results when Proxy Resolution is 1:1 and the zoom level changes

# Known Issues

## 3D

- ID 582327 - The order of errors displayed in the viewer does not match the order of nodes erroring in the Node Graph

- ID 599250 - Overlapping items in the 3D viewer can display incorrectly when scrubbing through the timeline, ocassionally appearing slightly displaced

- ID 601196 - Materials are not appearing in the 3D viewer after deactivating and re-activating its materials parent scope using a GeoActivate node. To workaround, deactivate the material path directly or use the {isa:Material} mask pattern used in the "All Materials" mask option.

- ID 601279 - Snapping the GeoTransform's pivot to a bounding box sets the handles into the wrong place depending on the prim transform order knob setting

- ID 602910 - Separate EXR AOV files will not work with GeoPoints

- ID 602975 - GeoPoints mat input does not use texture coordinates

- ID 603091 - GeoImport frame range knob doesn't affect animated alembic files

- ID 603322 - GeoPointsToMesh materials are loading incorrectly

- ID 603629 - Cone softness and angle handles can be pushed past their intended value limits with expressions causing them to become unresponsive

- ID 603658 - 3D Viewer renders incorrectly when using RGB channels

- ID 604478 - GeoActivate's preset mask path options currently does not re-activate de-activated prims

- ID 604715 - Resetting deactivated payloads in the GeoImport node generates a lot of Console error messages

- ID 604885 - Projections can disappear from the 3D viewer when a FillShader is connected to another part of the scene

- ID 605111 - GeoImport scene graph options can be slightly delayed when toggling

- ID 605314 - Creating a Scene+ only connects the Camera to the ScanlineRender2 node and connects the GeoScene node to the Cameras 'scene' pipe

- ID 605741 - GeoEditCamera's 'Horizontal/Vertical Offset' knobs produce different results than the Camera nodes 'Window: Translate (u, v)' knobs

- ID 606346 - WireframeShader render results can be incorrectly affected by lights in the scene

- ID 606537 - When texture wrap mode is set to repeat it is not rendered by ScanlineRender2

- ID 606740 - The PreviewSurface node is not reflecting material colours

- ID 606741 - GeoTransform 3D hotkey handles do not take precedence over an open text node

- ID 607127 - Node graph navigation performance slows down when GeoBindMaterial is connected to a second viewer on MacOS

- ID 607218 - Popup scene graph for mask inputs can show prims that only exist further down the node graph

- ID 607366 - GeoImport can display an incorrectly scaled camera locator with certain scenes

- ID 608104 - GeoMerge isn't updating material binding paths

- ID 608232 - Geo nodes that generate meshes have authoring knobs

- ID 608460 - Nuke may slow down briefly when creating or deleting nodes with masks set to All Prims on large stages

- ID 608549 - Adjusting the GeoCameraTracker point size knob can cause small delays if the viewer is connected to ScanlineRender2

- ID 608700 - Hydra Viewer premults textures without a premult node

- ID 608924 - PointsGenerator removing connected Camera from dropdown menu

- ID 609164 - Swapping the A and B pipes of a GeoMerge with two GeoImport attached doesn't swap around their load rules, causing payload update issues.

- ID 609223 - GeoImport gives unimformative errors when importing an obj file

- ID 609316 - Materials stay deactivated in 3D viewer after reactivating materials scope in Viewer scene graph

- ID 609428 - Meshes have added xform parents after exporting to alembic

- ID 609561 - Camera Randomly Draws in Different Location While Manipulating Z-Far Knob on DeepCrop Node

- ID 609604 - The 3D viewer now retains the selected and active camera throughout timeline playback, regardless of Deep Node activity.

- ID 609832 - Scene graph override indicators did not sync between multiple Viewers

- ID 609993 - ScanlineRender2 doesn't apply subdivision when set on the mesh prim

- ID 610038 - Geo vertex/face selection persists after node is deleted

- ID 610149 - The emissive output of the PreviewShader was inconsistent between Hydra and SLR2

- ID 610265 - Points input label of GeoPoints node sometimes moves away from input when the changing zoom level of the node graph

- ID 610766 - MtlXStandardSurface node causes Nuke to briefly hang when updating

- ID 610817 - Activating and Deactivating prims in GeoImport can lag and increases RAM usage

- ID 610818 - Activating and Deactivating prims in GeoImport can cause GL errors and crash Nuke if the asset being loaded exceeds the RAM available on a machine

- ID 611614 - The Wireframe shaders operations for over and modulate display the same

- ID 611771 - Clearing cache frame holds ScanlineRender2 output if it has specific animated texture (animated Roto or GridWarp)

- ID 612087 - DirectLight is not illuminating an asset with BasicSurface material applied in the Hydra Viewer

- ID 612134 - Basic surface effects grid and light locator colours.

- ID 612191 - Camera position jumping around when changing Knob on Deep Nodes

- ID 612633 - When the default GeoPoints node is given the src input of a GeoSphere the node will error

- ID 612791 - Unloading a payload does not remove the unloaded items from GeoImport scene graph

- ID 612804 - The "Select all search items" option in the GeoImport Scene Graph doesn't update graph depth

- ID 612805 - Decreasing Graph Depth expands branches that were collapsed

- ID 612857 - Cyclical USD import error disappears when nodes are created below the GeoImport or GeoReference nodes

- ID 613152 - Geometry created with Nukes 3D geometry nodes are not automatically selected in the viewer or scenegraph on creation

- ID 613214 - 3D Errors don't show in 2D viewer with Scanline Render on script load

- ID 613263 - Scenegraph controls can become unresponsive after switching viewers

- ID 613471 - GeoImport error disappears after frame change

- ID 613472 - Deleting GeoImport node doesn't clear memory immediately.

- ID 613514 - PreviewSurface will error when a texture input is connected

- ID 613586 - Expression links can break when updating knobs on expression linked nodes

- ID 613661 - Adjusting mesh topology doesn't update the selection outline in 3D viewer

- ID 613909 - When you have a frame held/time offset Camera connected to GeoScene in the new 3d system, the time node now correctly effects the camera injected into the USD scene.

- ID 613932 - Automatic keyframes no longer added on the Error Per Frame knob unless explicitly requested by the user

- ID 613987 - Animated camera locators in the 3D viewer will break when connected to a enabled Framehold node inside a disabled group

- ID 614085 - Animated projection using Project3DShader will break when a disabled Framehold node is removed. As a workaround, disconnect and reconnect the camera.

- ID 614219 - EnvironmentLight node errors when added to the Group

- ID 614388 - GeoActivation Scenegraph 'collapse all' cannot be undone

- ID 614497 - 3D Viewer selection works only for B input of GeoMerge node set to duplicate prims

- ID 614511 - SLR2 may inconsistently display/render the currently selected texture from a Switch node

- ID 614624 - Deviating from the Camera position and reselecting the 3D camera will not reframe the shot

- ID 614669 - Playback Hangs After Disabling and Removing 2D Node Downstream of TimeOffset

- ID 614914 - Materials don't display if they are de/reactivated in Scene Graph

- ID 614916 - GeoBindMaterial can't be deselected via nodegraph if material selected in scenegraph

- ID 614930 - Whilst using GSV's in conjunction with lights, some sliders may not update.

- ID 615013 - GeoActivation affects Camera branched out upstream in the node graph

- ID 615032 - Animations on 2D nodes may behave incorrectly when connected to AppendClip.

- ID 618173 - When using a `DeepMerge` node to combine outputs from a `SplatRender` and `ScanlineRender2` (SLR2), the geometry rendered by SLR2 appears in the incorrect location.

- ID 618305 - Subdivision is not correctly applied in the 3D Viewer

- ID 618363 - Description
  Alembic (.abc) files exported with baked transform animations do not display geometry in Hydra when reimported using GeoImport, while ReadGeo works correctly.

- ID 619461 - Loading/Unloading payloads using GeoImport doesn't update in 3D viewer

- ID 620270 - USD scenes authored using MaterialX 1.39 and containing an ND_normalmap_float Node in a material may crash when viewed in Nuke versions with older MaterialX

## Annotations

- ID 606420 - Brush strokes do not build up on self-overlap. You must apply multiple strokes to achieve a buildup effect

- ID 606536 - Horizontal toolbar doesn't scale down well when reducing the horizontal space available for it

- ID 606589 - Python API allows creating annotations with a negative duration

- ID 606901 - Colour Picker sample region cannot be moved when annotations are active

- ID 607584 - Modifying annotation properties using Python API does not update the viewer instantly

- ID 607590 - Undo functionality is currently not supported for modifications to annotation drawings properties.

- ID 607946 - Sync Session can crash when Force Update is pushed to different OS's than host

- ID 607967 - Duplicating a clip creates duplicate annotations in the timeline and panel, causing inconsistent functionality

- ID 608354 - Strokes generated via Python render one pixel thicker on Windows and Linux

- ID 608613 - Timeline markers do not update to reflect Annotations panel filter changes until the mouse hovers over the timeline

- ID 608873 - Annotations drawn on the B buffer remain associated with that buffer after disabling compare modes, making them inaccessible

- ID 609499 - Annotation filter stays on "Current Clip" when returning to sequence

- ID 609500 - The "Current Clip" filter in the Annotations panel is inconsistent and may not display all markers

- ID 609534 - Annotation export renders all tracks despite 'Tracks for Export' selection

- ID 609541 - Annotation export ignores cut length settings

- ID 610225 - Creating a new annotation generates two undo steps (one for the item, one for the stroke), requiring the user to undo twice to revert the action.

- ID 610322 - Shift+drag to scale the brush tool only goes as small as 2 pixels and as large as 2000. You can type in the tool bar to get lower or higher values.

- ID 610385 - Exporting a Nuke Annotation File takes as long as rendering the annotation's defined duration, even if you drew nothing on the screen.

- ID 610392 - All Annotation Comments have the 'Edited' label, even if they're fresh

- ID 610719 - Vanishing Brush over Sync Review degrades in client-side responsiveness as stroke length increases

- ID 610845 - Annotations created while viewing the B buffer are not visible during the drawing process; switch to the A buffer to view the strokes.

- ID 611248 - It is possible to change brush settings using python for locked annotations (also possible through python).

- ID 611255 - It is possible to lock or unlock annotations using python. However, this behaviour doesn't sync over sync review sessions.

- ID 611302 - Metadata can be set using Python on any comments or note on a clip. However, once metadata is set, it cannot be unset.

- ID 611335 - (Windows) Text Annotation can shift above its background

- ID 611591 - Viewer Annotations markers are slow to update when moving the playhead

- ID 611730 - When making a selection in a comment or note, the panel won't automatically scroll to accommodate text that's off screen

- ID 612964 - Comments/Notes can trigger viewer playback shortcuts when aggressively typing (J,K,L))

- ID 613243 - No clip level annotation markers are visible for single frame footage

- ID 613349 - Annotation Markers do not update correctly for clips that have been cut into different shots when the Current Clip filter is applied

- ID 613354 - Single frame annotation markers can be dragged outside the Sequence time making it impossible to get back if it reaches negative values

- ID 613355 - Focus does not stay in Annotations panel after editing comment or note text

- ID 613601 - Editing an annotation with the PythonAPI, when the Panel is hidden, causes a panel layout issue

- ID 613613 - Playback will not show annotations if they're too slow to cache

- ID 613697 - Clip Annotations are no longer duplicated in the Panel when a clip is split

- ID 613855 - Undoing annotations during sync review can have a build-up of unwanted annotations for client side

- ID 613884 - Create Comp no longer puts Annotations on the wrong frame in the Node Graph if the clip is the moved

- ID 613988 - Sequence Level annotations are not exported if a Clip Level annotation is in the frame

- ID 614072 - Overwriting a CreateComp re-renders the annotated frames

- ID 614339 - Annotation markers won't necessarily appear where you'd expect them if there is more than one copy of that clip on the timeline.

- ID 614341 - Cancelling a comp that has annotations will lead annotation node to an error'd state

- ID 614380 - Zooming in and out quickly no longer leaves ghost images of the viewer when annotations are enabled

- ID 614934 - Focus no longer switches away from Annotations panel after closing a comment/note text box

- ID 616771 - Annotations Toolbar buttons doesn't much behavior with other Toolbars like the Roto

- ID 616773 - Scaling multiple annotations in the viewer is not intuitive

- ID 618360 - Text annotations on Locked annotations can be edited

- ID 618489 - Notes on Locked Annotations can be deleted in the UI, but reappear after the Annotation is unlocked

- ID 619500 - Enabling annotations does not prevent the fullscreen hotkey (spacebar) from working in the Viewer

## BlinkScript

- ID 606124 - OpenCL GPU on Windows outputs grey instead of black on CPU/CUDA

## Colorspace

- ID 613757 - 8-bit and 16-bit default LUT settings are swapped/incorrect with 2.x.x ACES OCIO configs.
  To workaround this you can manually swap these defaults to their previous values. This can be done via the Preferences or as knob defaults.

## Contact Sheet

- ID 602881 - Creating a Contact sheet and adding all clips can give the error 'Bad value for view' in the terminal

## File Export

- ID 618130 - Large NotchLC files get stuck rendering the last frame for a very long time

## File Formats

- ID 610833 - NotchLC sometimes exports files with artefacts

## Graph Scope Variables

- ID 608572 - Renaming a Regular Group nested in a VariableGroup, won't update in the Variables tab

- ID 612465 - The 3D System does not work with VariableGroups with multiple differing variable values in the same node graph

- ID 617621 - Nuke crashes when using setGsvValue() on the Root during startup

## Node

- ID 616767 - Camera4 doesn't automatically evaluate expressions on its file knob

- ID 617341 - ModelBuilder geometry and other UI elements are not displayed in the Viewer when there is a src input, and 'Show Source Image' is enabled

## Python

- ID 618770 - Clip methods like addTag() and removeTag() are much slower depending on the number of items in the Project Bin

- ID 618777 - A crash occurs when clearing or reopening a script with a Viewer connected to a GeoPython node in Nuke.

## Quick Export

- ID 605191 - There can be color differences between Quick and Custom export

- ID 605194 - Exporting to Apple Prores 444 XQ with default value in Quick Export can produce a cropped output

## Shortcuts

- ID 607974 - Backdrops can not be created within a group node with the shortcut key

## Timeline

- ID 608402 - Although the "New Track(s) from EDL/XML/AAF" dialog accepts OTIO files, the specific "New Track from OTIO" option should be used for this format.

## UI

- ID 620120 - Hitting Cancel on a nodes parameters floating panel removes the node

# Qualified Operating Systems

- macOS Sequoia (15.x), or macOS Tahoe (26.x)

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

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

- 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

Nuke 16.1 requires an NVIDIA GPU with graphics drivers capable of running CUDA 11.8 or above

Nuke 17.0 requires an NVIDIA GPU with graphics drivers capable of running CUDA 12.8 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.

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.

# 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")