3D Shapes
Improved the ability to create swept blends whose path is long but with small curvature, so that it's nearly linear in a bird's eye view.

Autodesk Account Sign In
Improved security when signing into Autodesk account by updating Identity Desktop SDK.
Removed unnecessary reload steps for login status after some idle time.

BIM 360 - Publish Setting
Fixed an issue where the Publish Settings dialog doesn't have keyboard shortcuts.

Background Processes
Improved cleanup of C:\ProgramData\RevitInterProcess.
Fixed an infinite background calculation issue caused by extensible data storage.

Beams and Braces
Improved stability when using the Change Reference command inside a family.
Fixed an issue that caused "Elevation at Top" and "Elevation at Bottom" parameters to report "Varies" instead of correct values for structural framing of non-structural families.
Improved stability when a user tries to move structural framing which has an associated SketchPlane dependent upon a structural column.
Fixed an issue that blocked the user from using structural beam snap points when the element was added through a linked Revit file.

Category Visibility
Fixed an issue that might lead to instability when working with schedule view.

Color Fill
Fixed an issue where a new color scheme entry could not be created.
Fixed an issue where new entries cannot be added after deleting other entries in the "By Range" scheme in the Color Fill dialog.
Fixed an issue that prevented some values from being displayed in a system color scheme's color fill legend.
Fixed an issue that might lead to instability when working with color fill legend.
Fixed an issue that might lead to instability when working with a color fill scheme.

Column
Fixed an issue in which the concrete beam was not joined with a slanted column, using Horizontal cut style.
Fixed an issue that caused vertical columns that have the Column Style parameter set to slanted to not flip and mirror properly and caused columns to sometimes change orientation when the Column Style parameter is changed from Vertical to Slanted.
Fixed an issue visible when trying to use an array parameter for a structural column while defining a generic family.

Content
Corrected Height parameter behavior in "2 Layer Sliding_Shoji (No Frame).rfa" from JPN library.
Corrected the subcategory of symbolic lines for steel beam families in the German Library.
Fixed an issue in which the rectangular shape concrete beam, from the New Zealand content, extended with 12.7mm on each side.
Fixed an issue in which several steel shape types were unsorted inside the W Shapes.rfa Revit family.
Updated the project location of structural and MEP templates to be consistent with Architectural template in English Metric and Imperial library.
Reversed the front and back view name of Metric Generic Model ceiling based.rft.
Fixed an issue that caused the "T-Tees from Universal Columns.rfa" shape to move up or down inside the model, when then Level of Detail was changed from Medium to Fine.
Updated the elevation of project base points in Germany project templates to 0.
Fixed incorrect "Diagonal down 1.5mm" fill pattern in project template files.
Fixed an issue in which several parameters from Joist-Girder families couldn't be tagged because they were set as Family and not Shared.

Coordination Model
Removed an unnecessary warning dialog when an unloaded Coordination Model could not be found when opening its host file.

Copy-Cut-Paste
Fixed the issue that copying and pasting a tag on a nested family will make the whole family and tag moved.

Curtain System
Improved stability when working with curtain walls.

Dimensions
Improved stability when creating ordinate linear dimensions.
Improved stability of ordinate linear dimensions which converted from a non-ordinate linear dimension with multiple equality symbols.
Fixed an issue when loading updated spot elevation symbols into models.
Fixed an issue with dimension when mirroring a project.
Fixed an issue that might lead to instability when working with linear dimension.
Improved performance up to 2x faster when editing grids with dimensions.
Fixed an issue when dimension "Read convention" set to "Left, then Up".

Edit
Fixed the issue that generic model was placed on the wrong level using underlay of the level above.

Export DGN
Fixed an issue where line patterns would remain in the DGN export settings even after deletion from the model.

Export DWG/DXF
Fixed an issue where line weights would be incorrect when exporting to DWG using phase filters with overrides.
Fixed an issue where the non-plottable layers option could not get toggled when the prefix for non-printing layers would get deleted.
Fixed an issue where exporting to DWG would fail if the exported view contained very small spline geometry.
Fixed an issue regarding DWG export so the entities inside the customer's block include missing XDATA.
Fixed an issue where patterns would get deformed when exported to DWG with the units set to meters.
Fixed an issue where the size of solids exported as polymesh to DWG would be slightly inaccurate compared to Revit.
Fixed an issue where a 3D perspective view placed on a sheet would get incorrectly cropped when exported to DWG.
Fixed a button length issue of the DWG export setup dialog which caused the text to not fit the button width when translated into certain languages.
Fixed the title length issue of the export DWG add / edit modifiers dialog which caused the text to not fit the dialog boundaries when translated into certain languages.
Fixed the title length issue of the export DWG and DGN settings dialog which caused the text to not fit the dialog boundaries when translated into certain languages.
Fixed an issue where images in rotated views placed on sheets would be moved unexpectedly when exporting to DWG.
Fixed an issue where the area of polylines resulting from the export of room and area boundaries to DWG did not match the areas in Revit.
Fixed an issue where some text exported to DWG would be in reverse order, when the system locale was set to Arabic.
Fixed an issue where different columns would be exported as identical blocks to DWG.
Fixed an issue where the cut layer name in DWG export settings would become equal to the color ID.
Fixed an issue where blocks would be placed on a layer with an incorrect name when exporting to DWG and using layer modifiers.
Fixed an issue where small objects would not export correctly to DWG at large drawing scales.
Fixed an issue where identical hatch patterns would be incorrectly reused when exporting to DWG.
Fixed an issue where solid elements with elliptical shape could not be exported to DWG as ACIS solids.

Export FBX
Fixed an issue where small objects were not exported to FBX.

Family
Fixed an issue where copying some annotation families into a new project caused the data in the family to become invalid.
Fixed an issue that occurred in the family environment when the name of a text parameter was used as the value of a formula.
Corrected an issue where in-place family parameters could not be sorted or re-ordered in the Family Types dialog.

Family Editor
Fixed an issue where family parameters could not be moved if another group of family parameters was collapsed.
Fixed an issue that prevented creation of a swept solid in certain cases during upgrade of a Revit model.

File Open/Save
Improved the stability when saving and opening files in a deep path which is longer than 260 maximum characters
Fixed an issue where saving a model in a directory that contains certain characters, such as a period, would change the filename to match the directory name.

Fill Patterns
Fixed an issue in Wireframe views where transparent solid fills were opaque when printed.

Filled or Masking Region
Fixed an issue where detail items would not display correctly using the Show Hidden Lines tool if there was a non-masking filled region in the view.

Floor
Fixed an issue to make creating a floor by picking lines more stable.

Foundation
Fixed an issue where wall foundations with eccentricity would join incorrectly.
Fixed an issue where a schedule would report a blank value for built-in instance parameters of structural foundations.
Fixed an issue where the slab span direction symbol type could not be changed.

Graphics
Fixed a performance issue when selecting structural connections in a Realistic view.
Fixed and issue where Underlay Lines and edges were incorrectly visible through solid fills inside nested generic annotations.
Improved stability when editing text in a rotated view.
Fixed an issue in Realistic views where Linked Topography would not display shading after moving it to a new location.
Improved stability when dragging the end control of a joined wall.
Fixed an issue in Realistic views where advanced materials with the Reflectivity option containing a texture was not displayed correctly.
Fixed an issue where setting the saturation value to 0 in Color Correction of a Realistic view made the whole view black.
Fixed an issue in Realistic views where incorrect lighting was making Reflected Ceiling Plans, and Structural Plans looking up, appear too dark.
Fixed an issue where some elements in linked Revit models might not appear when cut in section.
Fixed an issue where the Linework tool would cause nearby hidden lines in joined geometry to disappear.
Improved stability when opening some views in large complex projects.

Groups
Fixed an issue where some detail group types could not be set from the Type Selector or placed in a view without the type changing.
Fixed an issue where some detail group interactions, such as when adjusting the view Crop Region or adding overlapping detail elements, would incorrectly trigger the ‘Changes to groups are allowed only in group edit mode’ error.
Improved stability and performance while active in group edit mode and modifying existing or creating new elements.

Host Inserts
Improved stability when upgrading projects with incorrectly hosted elements.

IFC
Fixed positioning of curtain walls when exporting IFC files using shared coordinates not at the internal origin.
Fixed the heights of levels in some linked IFC files when ElevationOfRefHeight was used.
Improved exporting properties in IFC files for doors and windows that are hosted by multiple walls.
Fixed export of some openings in stacked walls to IFC.
Fixed IFC export of some openings in walls.
Improved IFC export of some property sets, including IFC4 provision for voids.
Improved transparency for some elements when linking in IFC files. Fixed location of origin when exporting some IFC files with the internal origin option.
Improved port connection information when linking MEP IFC files.
Supported recesses when exporting IFC4 files.
Improved linking of IFC files that include entities that have both their own geometry and parts with geometry.
Allowed opening of some IFC files that contained walls with no thickness.
Fixed the length of some extruded objects during IFC export.
Improved the export of materials to IFC for some non-extruded elements.
Added support for linking in objects in IFC files using IfcGridPlacement for positioning.
Improved the export of materials in IFC files.
Made all IFC exports persistent when creating new export setups.
Corrected grid spacing when opening some non-Imperial IFC files.
Allowed linking in entities in IFC files with very large geometric representations, that were previously disallowed for performance concerns, and added slight performance improvements.
Allowed the linking of some IFC files with incorrect bounding of swept solid geometry.
Allowed linking of some IFC files with entities that have invalid position information.
Improved linking of some IFC files with extruded geometry with finely tessellated boundaries.
Allowed proper opening of IFC files containing wall, floor, and roof types with very thin material layers.
Improved the linking of some IFC files containing windows or doors in walls split into parts.
Improved creation and color of sub-categories created during link IFC to distinguish special geometry such as spaces, openings, distribution ports, and bounding boxes.
Improved linking of some IFC files whose data was located very far from the origin.
Allowed objects in IFC files with filleted profile definitions too small for Revit to be linked into Revit without their fillets.
Disallowed entering a reserved windows name when exporting an IFC file.
Improved import of some geometry in linked IFC files that contains Boolean operations.
Fixed the relative locations and orientations of IFC files created using the "Export links as separate models" open.
Improved support for linking some IFC4 files using the IfcLineIndex entity to specify geometry.
Improved size and location of beam axes exported to IFC.
Improved support of export of steel connections to IFC.
Improved the size and performance of some exported IFC files that contained finely tessellated geometry by limiting the maximum size of the tessellation for any element.
Improved linking of some IFC files with swept solids with self-intersecting profile boundaries.
Improved IFC linking of some geometries that contained very small extrusion outline segments.
Corrected export to IFC of some openings generated by families with instance geometry.
Improved linking of some IFC files that contained elements with very thin extrusions.
Improved linking of certain IFC files with invalid geometric representations.
Improved linking of many IFC4 Addendum 2 files, the official version of IFC4.
Improved support for UTF-8 files when setting options for IFC import/export.
Improved import of some IFC4 files originating from AllPlan.
Allowed export of grids to IFC if there are no building stories in the file.
Corrected the export of layer assignment to IFC for some floors with openings.
Updated the URL for UniFormat in IfcClassifications in exported IFC files.
Fixed an issue that caused steel plates and anchors to be exported at the wrong position in IFC when project base point was set.
Allowed IFC export of files containing elements mapped to the IfcCivilElement entity.
Fixed the creation of some wall types with multiple layers when opening IFC files.
Removed truncated strings from some localized IFC dialogs.
Improved support for linking in IFC files containing entities with swept disk solid geometry.
Corrected the location of some BRep-based stairs when exporting to IFC.
Fixed IFC export of door swings for door panels in curtain walls.
Corrected value for volumetric flow rate quantities for IFC exports when using L/s as the unit.
Improved support for beam covers when linking some IFC files.
Fixed the area quantity calculation when exporting doors to IFC.
Improved positioning for some objects while linking IFC files.

Import/Export Image
Improved stability when loading very large tiff files as images.

Import/Export Other
Improved import SketchUp files to properly hide invisible geometry.

Import/Export/Link DWF
Improved stability when exporting specific cases of cut geometry to dwf and BIM 360.

Import/Export/Link SKP
Fixed an issue related to picking certain portions of Revit Families containing imported SketchUp models.

Import/Link DWG/DXF/DGN
Fixed a potential issue when loading Import Lineweights from a file.
Fixed an issue that can occur when invalid values are entered in the Import Line Weight dialog.
Fixed a stability issue when importing or linking certain DWG files which contained invalid data.

Install
Set the minimum supported Windows OS version is Windows 10.

Join Geometry
Removed unnecessary join warnings generated during worksharing process.

Keynoting
Fixed an issue with keynote tags where they would not get by-sheet keynote numbers if they were tagging duct insulation, duct linings, pipe insulation, pipe linings, flex ducts, or flex pipes which are above the cut-plane of a floor plan view.

Legends
Fixed an issue with the uniqueness of System Family names in Brazilian Portuguese: before the fix two System Family names "Label" and "Legend" were translated to the same word in Brazilian Portuguese; now "Label" is replaced by "Tag Label". Non-uniqueness of the System Family names led to inability to create Legends in Brazilian Portuguese Revit after execution of Purge Unused command.
Fixed an issue where a legend component may not always respond to detail level changes to the view, even when the parameter 'Detail Level' is set to 'From View'.

Licensing
Fixed an issue where user license expired unexpectedly causing Revit to fall into a 10 minute grace period, after which Revit is automatically terminated.

Link Topography
Fixed an issue when aligning the position of a linked topography whose scale factor was not set to 1 with the current Revit model.

Location
Fixed an issue that caused incorrect font encoding when text was translated to a different language.

Materials
Improved stability when editing/ painting colors with materials.
Fixed an issue where the Material browser would load thumbnails unnecessarily.
Improved stability when creating/editing materials.
Fixed an issue that material texture not found after moving textures to a new assigned render path folder.
Fixed an issue that the material of cloud rendering might be incorrect with linked models.

Phasing
Fixed an issue with Phase View Filters where duplicate default phase view filters were created after transfer project standards.

Plan Regions
Fixed the issue that lines are slightly rotated when the crop region is rotated as a very small angle, smaller than 0.3 degree.
Resolved the issue that the cut pattern of the structural column missed when placing plan region on it.

Print
Fixed an issue where text in Linked CAD file printed with incorrect color in Structural Discipline views with Hidden Lines mode set to All.
Fixed an issue where views set to Realistic that were not directly opened in the session would print wireframe when printing multiple selected views and sheets.
Fixed an issue where the Print Settings such as hiding reference planes and crop regions were not working in Realistic views.
Fixed an issue where current view only CAD links and imports set to display in background incorrectly displayed hidden lines that would not print with the Show Hidden Lines view parameter set to All.
Fixed an issue where some hyperlinks were not created when printing to PDF due to plan views being rotated to True North.
Fixed an issue where placed images set to background would print in front of geometry in a view with a non-rectangular crop region.
Fixed an issue where current view only CAD links and imports set to display in foreground incorrectly printed extra hidden lines with the Show Hidden Lines view parameter set to All.
Fixed an issue where the Reconcile Hosting icon temporary graphic was incorrectly visible on screen without the family selected and in print if the Linework tool had been used on the family in the view.
Fixed an issue with unexpected solid fill on walls from Revit link in Mechanical consistent color view with non-rectangular crop region when printing in vector mode.
Fixed an issue where some hidden lines in a structural view set to by discipline did not print if the view was rotated counterclockwise on a sheet.
Fixed an issue where an inserted image or PDF was not cropped by a non-rectangular crop regions in a vector print.
Fixed an issue where in a section view with the Far clip set to clip without line, lines created by edges outside view range incorrectly displayed but did not print in vector.
Fixed an issue where some hidden lines created by edges of joined geometry would display in the view but not print.
Fixed an issue where arrow shaped fill patterns would print incorrectly in a Structural Plan with View Direction set to look up.
Fixed an issue where print of hidden lines created using the Show Hidden Lines tool with detail elements did not match the screen.
Fixed an Issue where the order of creation of solid fills would effect how they printed so they did not match the screen.
Fixed an issue where a Point Cloud nested in an RVT link forced all views to print raster regardless of the point cloud visibility in the view.
Fixed an issue where views with MEP Hidden lines on and Show Hidden lines set to none would display hidden lines off on screen but incorrectly still print the hidden lines.
Fixed an issue where the boundary line of transparent solid filled regions were not clipped correctly by non-rectangular crop regions in a vector print.

Properties Dialog
Improved the stability when a parameter value contains line breaks in Properties palette or schedule.
Fixed an issue when changing parameters in the Properties dialog.
Improved performance when using the type selector.

RPC
Improved stability when working with RPC library.

Railing
Fixed an issue with certain railings that had prevented views from opening.

Revit Home
Updated the Japanese font on Revit Home.
Fixed an issue so that Revit Home doesn't show an empty folder after clicking the Refresh icon.
Fixed an issue where the "Go to BIM 360" link in Revit Home does not work when customers created a new project in BIM 360 Docs.
Fixed the issue where the Publish to BIM 360 dialog string and layout is inconsistent in Japanese.

Roof
Improved the speed of modifying walls or inserts in walls associated with a footprint roof with a dormer opening.
Fixed an issue when creating roof layers in a section view for roofs with cuts or other complexities.

Room/Area/Space
Fixed a problem that caused 3D room geometry to not be bounded by a footprint roof if the roof's Rafter Cut property was changed from "Two Cut - Square" to another setting.
Improved stability of room calculations.

Schedules
Fixed the behavior that combined parameter now can display corresponded Material information.
Fixed an issue when working with furniture schedules.
Fixed an issue where the panel schedule zoom level was unexpectedly restored by undo/redo.
Fixed an issue that project information doesn't update in combined parameters of schedules.
Fixed an issue that non-supported parameter displays incorrectly in the schedule for Revit LT.

Section/Elevation
Fixed an issue where using the Create Similar command on an elevation view would create an unexpected drafting view.

Shared View
Fixed the truncated texts for help links in shared view notification dialog for longer languages.
Fixed the truncated texts in shared view notification dialog for longer languages.

Sheets
Fixed an issue where Realistic views rotated on a sheet would display and print without shading.

Site
Fixed the issue that table based property lines rotate twice when rotating project north to align with the selected line.
Fixed an issue that the material texture rotation is wrong for site topography.
Fixed an issue where subregions and railings placed on a toposurface were lost after using the merge surfaces tool to merge the toposurface in a certain order.
Fixed an issue where contour labels placed on topography didn't report correct elevation values when its elevation base was set to Project Base Point.
Fixed an issue where part of the site cut material was missing in section views when the section was split into segments.
Fixed an issue where spot dimensions placed on topography were deleted after split surfaces were merged.
Fixed an issue where not all of Cut and Fill parameters in a topography schedule updated after moving one of the topography which impacted the cut and fill calculation result.
Fixed an issue that the building pad does not cut topography when its point is exactly on the edge of topography.

Sketching
Fixed the issue so that Start-End-Radius Arc would work as expected when the model is mirrored.

Stair
Improved stability when editing railings on a stair.
Improved the performance to open floor plans with multiple stairs/railings.
Improved stability when editing and copying stairs.
Improved stability when editing the location line when sketching a stair.

Structural Families
Fixed an issue related to FamilyInstance.Split method which failed to work properly when the instance was near 0,0,0.
Fixed an issue in which the imperial families: W Shapes.rfa and W Shapes-Column.rfa, had a Perimeter value that was 12 times bigger than the units in which the value was set.
Fixed an issue in which some lines from family instance were not cut by void geometry.

Sweeps
Fixed wall sweep displaying issue on ceiling plan view.

Tags
Fixed an issue that tag cannot be edited when it contains Multiline text shared parameter.
Fixed the issue that structural beam tags changed position after reloading linked file.
Fixed the issue so that a family with nested line-based shared families could be copied and pasted.
Fixed an issue so that annotation text would display correctly when the first letter is displayed as a special character.

Text
Fixed the issue that exporting Revit opaque text to DWG file missed the background mask.
Fixed an issue with incorrect text export to DWG when text containing Unicode combining character sequences.
Fixed the issue so that text would be printed as expected when using Override High DPI Scaling.
Fixed the copy-paste issue so that text would display correctly when there is a mix of Hebrew and English characters.

Transfer Project Standards
Fixed the issue that transferring project standards failed since there were duplicated imported categories names.
Fixed the issue in Revit LT so that the object setting of built-in categories and sub categories would be overridden after transferring project standards.

Underlay
Fixed the issue that family is placed on the wrong ceiling plan when the underlay level information in the ceiling plan view is changed.

Undo/Redo
Fixed an issue where an element was deleted after Undo/Redo in edit mode.

Upgrade
Fixed upgrade blocking issue by deleting and replacing error curtain panels with new ones.
Improved stability during upgrade for models that contain invalid detail elements.
Resolved truncated text on model upgrade dialog when displaying on some higher resolution screens.

User Interface
Improved stability when working with Revit view windows.
Fixed an issue for the user profile dialog display in DEU language.
Removed Autodesk APP Store button in Revit LT.
Improved the stability during line editing and then interacting with Ribbon commands.

View
Fixed an issue where the camera position of a locked view could be modified if a space mouse was being used.

View Templates
Fixed the issue that parameter value in schedule is not updated when the calculation rule under formatting tab is changed through schedule template.
Fixed the issue that Yes/No project parameters failed to set correctly in applied view template.

ViewCube Navigation
Improved stability when navigating using view cube under given circumstances.
Fixed an issue with an incorrect tooltip when closing steering wheels on the preview of type properties.
Improved stability when interacting with the navigation wheel.

Wall
Added the ability to copy a tag of an element placed on an infill host.
Improved the "Attach Top/Base" tool when attaching one wall to another when at least one of the walls is Slanted.
Improved stability when editing wall wrapping at inserts.
Fixed the error message when entering an invalid value for the angle of a slanted wall.
Improved the stability when opening material browser from wall type edit.
Fixed a problem that caused wall layers in a Section view to not be shown when a reveal had a corner that just touched a layer boundary.
Fixed the hatch pattern shift issue for walls after changing cut plane for Plan Region.
Enhanced the function to add reveal on the walls with arc line profile.
Fixed an issue to keep the connection between wall and foundation after changing wall type from basic wall to stacked wall.
Fixed an issue that wall foundation does not rotate along with wall after changing wall type from basic to stacked.
Provided stability to using temporary angle dimensions when creating slanted walls.
Fixed an issue that causes an error when the cross-section of a wall with a split face is changed to slanted.
Improved the stability when editing a stacked wall.
Improved stability when modifying or deleting wall due to the duplicated wall sweep ID.
Fixed an issue to keep the connection between wall and foundation after changing wall type from stacked wall to basic wall.
Fixed issues to keep the current phase for walls with foundations after splitting the walls.
Fixed the infilled wall clean up issue for demolished door which is overlapped with a new door.

Wall and Roof Joins
Improved the resilience by providing instruction when failing to create parts.