Jump to Known issues and workarounds.

Fixed issues

MAXX:Animation
Fixed an issue with audio playback after scrubbing. MAXX-51469
Fixed a crash when adding animation layers to CAT rigs with bone animation controllers set to use Setup mode. MAXX-49697
Fixed a crash with Prosound when missing referenced audio files. MAXX-48351
Fixed a crash with Prosound when using Dope Sheet. MAXX-45212

MAXX:CamerasPhysical
Horizontal and Vertical Lens Shift now animates as expected with hidden Physical Cameras. MAXX-40056

MAXX:Cloud
Fixed an issue where some materials that were formerly supported in Shared View stopped working with the release of 3ds Max 2019.3. Support for materials has been restored to what was available before 2019.3. MAXX-50880

MAXX:Core
Improved robustness of the Plugin Manager dialog so it no longer crashes when closing it with gflags. MAXX-51062
Fixed performance issue where Trackview was being invalidated when objects that could not be displayed in Trackview were modified. MAXX-50813
Fixed conversion of doubles in MAXScript (ex: 99.9d0) to allow decimal separators other than "." MAXX-50202
Improved StateSet's support for decimal symbols other than the one in the English Windows regional settings. MAXX-50201
Fixed several string truncation issues on Native Simplified Chinese Platform OS Win10 64-bit, non-100% DPI scaling, running 3ds Max with CHS language pack. MAXX-43696

MAXX:Fluids
Fixed issue with non-world Qt spinners not respecting decimal precision settings. MAXX-49408

MAXX:Interop
The options list when importing ProE now includes all the appropriate options and no longer changes. MAXX-50784
Units now always display correctly when importing STP files. MAXX-49829
Importing FBX files with materials no longer causes any crashes. MAXX-47244
Body object and joined body object are now properly exported as IGES. MAXX-45868
When importing STEP files from CREO4 using the Grouping option, the structure tree is now kept and objects are in their proper positions. MAXX-44948
Importing SketchUp files no longer fails if a component or group has a name longer than 128 characters. MAXX-43883
3ds Max will no longer crash or give errors when importing SketchUp files newer than version 2015. MAXX-32023
Removed "Google" from the SketchUp import name in the import options list. MAXX-29791

MAXX:MAXScript
AutoLayoutOnResize:true on rollouts now displays controls in the rollout properly. MAXX-51518
Fixed system exception when executing meshOps.attachList $ when an object is not selected. MAXX-51301
Improved robustness of the MAXScript Listener dialog to stop crashes when exiting with gflags. MAXX-51042
MAXScript Listener Editor, macro-recorder windows, and the Find\Replace dialog no longer have focus issues. MAXX-50876
Added a warning message to MAXScript when the value of a global variable is set through a local variable with the same name. MAXX-50742
Fixed memory leak in MAXScript Editor. MAXX-50600
Fixed string truncation issues in the PolyTools' Paste Selection dialog. MAXX-48090
Fixed string truncation issues in the Create Empty Project dialog when using Simplified Chinese language pack in Windows 10 with non-100% display scaling. MAXX-47122
Tape helper objects created through MAXScript can now be selected after calling the Enable() function on it. MAXX-36315

MAXX:MaterialEditors
Green channel now affects lift/offset in the Color Correct map. MAXX-50676
Reset Material Editor Slots no longer triggers a MAXScript error. MAXX-44486

MAXX:Modeling
Generally improved chamfer algorithms to better handle edge cases - producing more pleasing geometry overall and avoiding degeneracies such as flattening or skewing of edges. MAXX-51830
Fixed an issue where UVW Map would assert with particular mesh objects. MAXX-50859
Data Channel modifier now displays vertex channel data properly. MAXX-50606
Shell modifier no longer has rounding errors and doesn't make inappropriate float comparisons. MAXX-50440
Missing TextPlus MAXScript commands have been added. MAXX-49990
Fixed issues with chamfer UV generation. MAXX-49960

MAXX:ParticleFlow
Particle Flow no longer displays a blank window when launched. MAXX-38846

MAXX:Python
Accessing invalid object attributes using pymxs has become 20 times faster. MAXX-51358
Fixed issue iterating over many scene objects and inspecting their properties using pymxs. MAXX-50446

MAXX:Rendering
Multi/Sub-Object material ON/OFF toggle now works in Production with ART. MAXX-45695
Advanced Wood default preset now matches 3D Ash Glossy preset as expected. MAXX-43882

MAXX:SDK
Fixed an issue to make the following .NET API interfaces available: IPoint3Value, IQuatValue, IAngAxisValue, IEulerAnglesValue, IMatrix3Value, IPoint2Value, IPoint4Value, IBox2Value, IBox3Value, IArray, IBitArrayValue, IColorValue, IFileStream, IMXSDictionaryValue, IMSTime, IMSInterval, IName, INumber, IFloat, IDouble, IInteger, IInteger64, IIntegerPtr, IString, IStringStream, IStructDef, IStruct, IMAXBitMap, IMeshSelection, IMAXKeyArray, IMAXMaterial, IMAXMaterialLibrary, IMAXTexture, IMAXMeditMaterials, IMAXNode, IMAXNodeChildrenArray, IMAXPB2ArrayParam, IMAXModifierArray, ISet, IObjectSet, ICurSelObjectSet, IPathName, IMAXNamedSetArray, IMAXNamedSet, and ISafeArrayWrapper. MAXX-51387
Fixed issues in the 3ds Max .NET assembly (Autodesk.Max.dll) that caused 3rd party plugins and tools built against it to crash. MAXX-51357

MAXX:UI
Wrap Cursor Near Spinner option no longer behaves strangely when used near screen edges. MAXX-51427
Lock UI Layout toggle now works as expected in floating windows, such as the Scene Explorer and Track View. MAXX-51305
Hotkey Editor no longer has text cropping issues when the window is too small. MAXX-51079
Global Search tool icons no longer disappear after using certain search terms. MAXX-51043
Adding or removing a large number of layers no longer causes performance issues related to the Layers toolbar UI. MAXX-50896
Hotkey Sets now respect alphanumerical order in the set selector combo box when there is a mix of upper and lower case names. MAXX-50599
UI scaling and display now work as expected and overrides Qt environment variables. MAXX-50419
Modifiers no longer execute twice when mapped to the Spacebar as a keyboard shortcut. MAXX-49943
Tooltips for menu entries now skip level 1 content when they should go directly to extended/level 2 content. MAXX-49937
Right-clicking a spinner in a caddy control now performs a reset of the value, as expected. MAXX-48181
The MassFX toolbar now has all correct icons regardless of which workspace is in use. MAXX-43927
Continually pressing Alt+A or Shift+A no longer causes freezes or crashes. MAXX-42299
Dragging spinners across the screen borders no longer causes non-linear value jumps. MAXX-41617

MAXX:Viewports
Orthographic camera middle-mouse zoom now only affects 1 viewport. MAXX-51372
Multi/Sub-Object material ON/OFF toggle now works in the viewport. MAXX-45694

Known issues and workarounds

MAXX:FileIO
When the operating system decimal separator is set to a non-standard character, the WRL and ASE exporters use that character when exporting which may cause data issues. MAXX-51077