Rhino 6 Service Release 18 Release Candidate Available

Rhino 6 SR18 Release Candidate 1 for Windows and Mac (6.18.19239) is now available.
To get it, subscribe to the Release Candidate update stream on Windows or on Mac.

Bugs Fixed:

  • Annotation: Don’t change the style (RH-52007)
  • Annotation: DimLinear:
  • Annotation: Dot: Have to be deleted twice on the Mac Platform (RH-53769)
  • Annotation: Leader: Leader creation dialog doesn’t resize (RH-53276)
  • Annotation: Text: Italics permanent (RH-53387)
  • ApplyCurvePiping: Curve Piping property gets stuck on 0 (RH-53479)
  • BoxEdit: BoxEdit performance is remarkably lame right now. (RH-53935)
  • CullDegenerateMeshFaces: CullDegenerateFaces actually fixes faces (RH-53693)
  • Display:
    • Improve performance for models with many curves (RH-54194)
    • Selection color change (RH-53782)
    • Strange highlight color of blocks (RH-48408)
  • DocumentProperties: Line type display in DocumentProperties changes (RH-53955)
  • File IO: PDF export - Draw order (RH-53873)
  • Lights: Eto Light panel limits brightness to 100 (RH-54299)
  • Line: doesn’t adhere to document tolerance setting (RH-54279)
  • Match: Matching edge is not duplicated (RH-54404)
  • MergeAllFaces: MergeAllFaces hangs Rhino 6.13 on this polysrf (RH-50728)
  • MoveFace: MoveFace. MoveEdge in a block instance (RH-53898)
  • PluginManager: Property window pulsates (RH-53994)
  • RDK:
    • ASSERT on uninitialized content when clicking Use Texture (RH-54394)
    • ASSERT on uninitialized content when exiting UVEditor (RH-54393)
    • IRhRdkParamBlock incorrectly sorting display names (RH-54086)
    • Opening this file throws an exception in RhinoFileWather.Watch called from RDK. (RH-53767)
    • Paste creates unnecessary materials (RH-53707)
  • Rendering: RenderInWindow and RenderPanel incorrectly dispose of the image after assigning it to an ImageView. (RH-54251)
  • SDK: Python: UTF-8 issues with rs.PropertyListBox (RH-38621)
  • SDK: RhinoCommon:
    • Brep.CreateFromSweep fails in multi-threading (RH-53990)
    • InterpolatedCurveOnSurfaceUV issue (RH-54038)
    • PDF.DrawPolyline Bug? (RH-53709)
    • SetGrevillePoints on closed curves (RH-53980)
    • Typo in API - Curve.LcoalClosestPoint (RH-49162)
    • Typo in API - RhinoDoc.EndOpenDocumentInitialiViewUpdate (RH-49161)
    • rs.AddHatch() fails in a new file (RH-44211)
  • SDK: RhinoScript:
    • ObjectClash only working for extrusions (RH-54132)
    • Rhino.DimensionStyle returns null if dim style override in place (RH-53739)
    • Rhino.IsLine returns true on linear NURBS curve of degree 2 or higher (RH-53851)
  • TextField: Resizing Text Messes Up User Text Display in Text Field (RH-50777)
  • ViewCaptureToFile: Remove ScaleDrawing option (RH-54217)

Crashes Fixed:

  • Eto: System.ArgumentException: System.Windows.Size…ctor (Double width, Double height) (RH-53998)
  • Layout: Crash when selecting spotlight in detail (RH-53347)
  • Mesh2: Pangolin!CLBP_XMLNode::GetNodeAtPathImpl – (NTSTATUS) 0xc00000fd - A new guard page for the stack cannot be created. (RH-53815)
  • RDKCrash: rdk_ui!CRhRdkUiNewContentCtrl::AttemptToSelectItem – Access Denied (RH-54014)
  • Settings: System.ObjectDisposedException: System.Threading.TimerQueueTimer.Change (UInt32 dueTime, UInt32 period) (RH-51762)
  • Sweep2: Crash using Sweep2 (RH-54339)


  • File IO: Hookup SDK that supports SU 2019 files (RH-54149)
  • SelVolumeBox: Crossing mode and groups (RH-54262)

Regressions Fixed:

  • ApplyCurvePiping: Radius doesn’t update correctly in technical modes (RH-53480)
  • Display: Block dragging - dynamic preview is not shaded. (RH-53155)
  • File IO: STL Import regression (RH-54210)

SDK Enhancement:

  • SDK: RhinoCommon:
    • API Request GetDisplayModeOverride (RH-53985)
    • Add “Duplicate Layer and Objects” functionality in the Rhinocommon SDK? (RH-53950)
    • Expose CRhinoDisplayConduit::NotifyConduit to RhinoCommon (RH-29077)
    • New method TextureMapping.Evaluate (RH-53849)
    • New method to get custom mesh mapping primitive (RH-53684)
    • Wrap CRhinoDisplayModeChanged (RH-52991)

Usability Problems Fixed:

  • UserText: String table update creates display lag on large collections (RH-53945)

Rhino 6 SR18 RC2 (6.18.19246) is now available

Bugs Fixed:

  • Arctic display: Grasshopper Arctic Issue (RH-54023)
  • SDK: GHPython: Improve Mesh.Faces.ToIntArray performance (RH-54455)


  • Display: Use shader for technical display in all viewport (RH-54422)

Performance Improvements:

  • BoxEdit: General poor performance (RH-54040)

Rhino 6 SR18 RC3 (6.18.19253) is now available

Bugs Fixed:

  • Display: Hidden lines in details using technical modes don’t use the detail print color (RH-54297)