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# Katana 5.0v7 Release Notes

# Release Date

17 November 2023

# Previous Releases

- Katana 5.0v6 Release Notes

# What's New in Katana 5.0

These release notes describe changes from Katana 5.0v6 to 5.0v7.

For a high-level overview of important changes in the Katana 5.0 line, please see What's New in Katana 5.0.

# Feature Enhancements

## Performance

- The JIT compiler of the LuaJIT interpreter used by OpScript nodes is now disabled by default due to memory allocation-related performance issues that can arise under normal usage. It can be enabled by setting the environment variable `KATANA_OPSCRIPT_LUAJIT_JIT_COMPILER_ENABLED=1`.

## UI Improvements

- ID 554956 - Graph State Variables hidden using the hiddenVariables parameter in the Project Settings tab now remain visible in the Project Settings tab but are not shown in the variables pop-up dialog window accessible in the top toolbar.

# Bug Fixes

## Catalog

- ID 555499 - Deletion of Render Catalog Items did not free image memory, neither immediately, nor during interprocess garbage collection (the time interval set by `KATANA_INTERPROCESS_GC_TIMEOUT_SECONDS`, defaulting to 30 minutes).

## Network Materials

- ID 528036 - In the NetworkMaterial context, a trailing dot (.) character in the pagePrefix interface parameter, when used together with promoted parameters that are not already nested, caused errors and froze the Material Interface in the Parameters tab.

- ID 556926 - It was possible to erroneously convert a ShadingGroup node to a LiveGroup in versions prior to Katana 6.0v1 (which is when LiveShadingGroups were introduced).

## OpScript

- ID 519465 - When exceptions were thrown from the `Imath.Frustumf` and `Imath.Frustumd` classes in the Lua bindings, only a generic error message ("Lua Runtime Error: C++ exception") was reported to the scene graph. More informative error messages based on the exception type are now reported.

## Parameters

- ID 541856 - When a parameter in a node type configured with the EnableableParameterPolicy was deleted while being visible in a widget and set to show the node's default value, a crash could occur.

## Performance

- ID 554593 - Live Renders using Geolib3-MT could randomly crash when there were many or expensive Ops which were not thread-safe.

## Python

- ID 536671 - The `--prerender-publish` command and the Pre-Render Publish Asset action would error as a result of the `file()` function, which was removed in Python 3. The deprecated `file()` function has now been replaced with `open()` in the Pre-Render Publish Asset action.

## Rendering

- ID 525505 - When previewing a UsdPreviewSurface shader that referenced an incompatible file with <UDIM> in the file path using the GL Render Delegate, Katana would crash.

- ID 553284 - Katana did not accept any further operations after rendering a scene that included an ImageRead node with invalid file path.

## UI

- ID 544287 - When Katana was launched in Rocky Linux 9 systems (or equivalent), help dialogs would appear empty as the QtWebEngineProcess failed to start.

## USD

- ID 536034 - For a UsdSkel asset with multiple variantSets, if a variantSetName under the UsdInVariantSelect node was switched to a different value with the selection under the variantSelection field unchanged and belonging to the previous variantSetName, Katana would crash.

# Known Issues

## Catalog

- ID 114182 / BZ 49288 - When exporting a Catalog item you need to specify the export folder path to an existing folder. If the folder you're trying to export to does not exist on disk Katana will fail to export. (This issue is a regression in Katana 2.0v1.)

## Hydra Viewer

- ID 427252 - Locators created via PrimitiveCreate nodes can be snapped to in all modes, rather than just the Lights, Cameras, and Locators mode.

- ID 420882 - Changing between the Viewer (Hydra) tab's multipane layout options quickly can cause a crash or many error messages to be written to the terminal/console.

- ID 380129 - Use of non-conformant GL anti-aliasing modes that employ supersampling reduces rendered point size by the supersampling scaling factor. Katana currently employs any reported anti-aliasing mode (up to a maximum sample count of 16): as a workaround, change the viewerHydra.antiAliasing preference to a lesser anti-aliasing mode.

- ID 352167 - Textures loaded from Hydra shaders are not cleared or reloaded from disk when flushing caches.

## Live Groups

- ID 85118 / BZ 41152 - When editing parameters of a node that is part of a LiveGroup node and reloading the parent LiveGroup node, the UI state of the Parameters tab is reset. This includes scroll bar positions, selections of items, and selections of nested tabs (for example Object, Material and Linking tabs for a Gaffer node).

- ID 84998 / BZ 41092 - When reloading a LiveGroup node's parameter interface and contents from its source, parameters of child nodes that are edited in floating panes disappear from those panes.

- ID 84020 / BZ 40598 - Reverting a LiveGroup node does not revert its user parameters.

- ID 84018 / BZ 40600 - Undoing a revert of an unpublished LiveGroup node does not restore the LiveGroup's editable and modified state.

- ID 83061 / BZ 40237 - Nodes can be dragged into the Group bubble of a non-editable LiveGroup node.

## Materials

- ID 442604 - When "exploding" a NetworkMaterialEdit node in the Node Graph tab into its parts by selecting it and choosing Edit > Explode Selected Groups or pressing the U key, Python exceptions are raised.

- ID 429775 - NetworkMaterialEdit nodes do not currently respect local Graph State changes, for example as performed by VariableSet nodes downstream.

- ID 429302 - When editing a locked node inside a NetworkMaterialEdit node graph, the parameters will be shown at their default state.

- ID 427408 - When entering a NetworkMaterialEdit node whose sceneGraphLocation parameter is empty, warnings are logged by the Geolib3 Runtime.

- ID 423341 - In a NetworkMaterialEdit node graph, connections can be displayed incorrectly if a node's name begins with a number.

- ID 402064 - In a ShadingGroup node graph, the connection between a Dot node and a shading node port can be wrongly colored in some cases.

- ID 269449 - Choosing Edit Shader Parameters from the main wrench menu of Material nodes does not show wrench buttons next to shader parameters. This can be worked around by toggling the edit flag on the node. (This issue is a regression in Katana 2.5v1.)

- ID 199304 - The namespace parameter on Material nodes wrongly allows the insertion of Unicode codepoints outside the ASCII range.

- ID 191052 - Katana does not have any support for the texture reference object workflows of V-Ray for Maya.

## Parameter Expressions

- ID 188533 - Expressions linked to non-local parameters on not previously edited Material nodes can't be evaluated.

- ID 105434 / BZ 47520 - Reference Expressions may not refer to dynamic parameters such as shader parameters.

- ID 60457 / BZ 31790 - Setting an array or group parameter to an expression results in an invalid expression. Upon setting a valid expression (for example, an evaluation of an equivalent parameter on another node using getParam), the parameter is not immediately updated. To workaround this issue, close and reopen the parameter, or flush caches while the node is not edited.

## Performance

- ID 105424 / BZ 47518 - Expressions using getParam to link to dynamic parameters would fail if the dynamic parameters hadn't yet been cooked.

## Python

- ID 496659 - When loading a website into a `PyQt5.QtWebEngineWidgets.QWebEngineView` widget, warning and error messages may be issued by the underling Qt WebEngine classes, leading to certain websites not being displayed correctly, or not being displayed at all. (This issue is a regression in Katana 4.5v1 / Katana 5.0v1.)

- ID 494168 - In the Katana Developer Guide, some members of C++ classes that are marked as `friend` incorrectly appear as `friend friend`. (This issue is a regression in Katana 5.0v1, and may be related to an issue in Breathe.)

## Rendering

- ID 524428 - Misleading error messages can be shown in the Render Log when live rendering with 3Delight.

- ID 523574 - Sourcing an aces v1.3 colour profile can cause Katana to crash when rendering with renderer plugins that don't currently support aces v1.3

- ID 381284 - The 3Delight renderer plug-in makes use of source material locations rather than resolved material attributes as a means of de-duplication. This can result in material data being lost when excluding material locations from the Render Working Set during a Live Render session.

- ID 176598 - Use of nodes that modify Graph State Variables in Interactive Render Filters is not currently supported.

- ID 74799 / BZ 36926 - The rendererSettings > displayOptions parameter of a RenderOutputDefine node for the PRMan renderer, shown when its type parameter is set to 'raw', cannot be set using the Parameters tab.

- ID 70217 / BZ 36176 - The 2D node Disk Render Upstream Render Outputs option does not use the batch render method, batchRender, for upstream render nodes, instead using diskRender.

- ID 70016 / BZ 36137 - Rendering repeatedly with a large number of AOVs consumes more and more memory, possibly leading to a crash when running out of memory.

- ID 12517 / BZ 16168 - Only one Monitor tab may display the results of a Preview Render. The use of multiple Monitor tabs is not currently supported.

## UI

- ID 373702 - Clicking in the Viewport and pressing a shortcut whilst the mouse is hovered in another widget will still send the event back to the 'focused' Viewport widget, for shortcuts where the widget hovered over does not handle the shortcut.

- ID 208802 - Closing the Histogram tab after use leaves the Monitor tab unable to display rendered images.

- ID 123558 / BZ 50911 - When changing an array parameter's tuple count/size, any corresponding attributes are not properly updated in the Attributes tab.

- ID 112544 / BZ 49051 - The Viewer tab may lose sync with the Scene Graph tab when changes to expansion state are interrupted.

- ID 107038 / BZ 47853 - Indication of attribute source nodes (such as the yellow 'glow' in the Node Graph tab) is unavailable as of Katana 2.0v1.

- ID 71965 / BZ 36691 - State badges are currently shown for attribute values of dynamic array child parameters, even though only their parent array parameter should appear with a state badge.

- ID 65347 / BZ 34949 - Using Compiz can lead to text fields not receiving focus events correctly due to an incompatibility between Compiz and Qt. Depending on your configuration, disabling Compiz "desktop effects" may resolve the problem.

## USD

- ID 468287 - UsdIn is not retaining expanded view state information for shading nodes in a Network Material context.

## Windows

- ID 381692 - (Windows only) When logging out and logging back in again, the colors in the UI are incorrect. For example, certain parts of certain types of tabs may appear with a white background color. (This issue is a regression in Katana 3.1v1, possibly caused by QTBUG-52728 - Paint bug and palette errors after some events in Windows)

- ID 344118 - (Windows only) When installing Katana and opting to install the bundled version of 3Delight, the installation of 3Delight is made by modifying system-wide environment variables such as `KATANA_RESOURCES`. Thereafter, launching any version of Katana will pick up this installation of 3Delight, which may be incompatible with the version of Katana being launched.

  NOTE: This issue does not affect Linux, where a bundled 3Delight installation is tied to its corresponding Katana installation.

- ID 218742 - (Windows only) Katana must be installed to a path no longer than ~140 characters. Attempting to install to a longer path results in an unintuitive error: "The system cannot find the path specified."

## Miscellaneous

- ID 84326 / BZ 40709 - The Alembic library does not support multiple process or thread access to an Alembic file. This means that a crash occurs when modifying an Alembic file outside Katana, while it's loaded in an open Katana scene. To avoid this, you must Flush Caches before attempting to update any modified Alembic files.

- ID 80738 / BZ 39261 - Operations that lock and unlock nodes do not currently create entries in the Undo History, which can lead to an incorrect node graph state when undoing and redoing operations.

- ID 70196 / BZ 36170 - Control keys (notably arrow keys) do not function as expected in shell mode.

# System Requirements

## Officially Supported Operating Systems

- Windows 10 64-bit or higher
- Linux 64-bit operating system (CentOS/RHEL 7)

## Hardware Requirements

| Minimum | Recommended
--- | --- | ---
CPU | Dual-core processor
Storage | 1+ GB available for installation
System RAM | 1+ GB available
Graphics RAM | 1+ GB available | 2+ GB available
Display | 800 x 600 | 1920 x 1080
OpenGL | OpenGL 4.3+ (see note below)

NOTE: AMD-based graphics cards are currently not supported.

## Tested Workstation Hardware

The configurations listed below are those that Foundry have tested with Katana. Due to the constantly changing nature and wide variety of computer hardware available in the market, Foundry is unable to officially certify hardware. The list below can be used as a recommendation and does not guarantee that it meets your particular needs.

- NVIDIA Quadro M4000

- NVIDIA Quadro P4000

- NVIDIA Quadro K4000

- NVIDIA Quadro K6000

Please download and install the latest graphics driver from the NVIDIA website.

If you encounter any issues, please contact Customer Support directly through the Support Portal at the following address: https://support.foundry.com.