Description:
When printing to vector output (e.g., PDF), certain bold fonts render as their regular weight instead. Raster printing produces the correct bold output. This is a regression — it was working correctly in a recent prior version.
Steps to reproduce:
-
Open the attached
.3dmfile containing text objects set to a bold font weight. -
Go to File → Print.
-
Set output to Vector.
-
Print to PDF.
-
Observe that bold text appears as regular weight in the resulting PDF.
-
Repeat steps 2–4 but set output to Raster instead.
-
Observe that bold text renders correctly in the raster PDF.
What happened: In vector output, the bold weight is lost — text prints as regular/normal weight.
What I expected: Bold text should print as bold in vector output, matching what is displayed in the viewport and in raster output.
Additional notes:
-
This is a regression; vector printing of bold fonts was working in a previous build.
-
Raster output is not an acceptable workaround for my use case, as I need vector output.
-
Attached: minimal
.3dmreproducible example file, vector PDF (showing the bug), and raster PDF (showing correct output) for comparison.
System Info:
Rhino 8 SR28 2026-2-10 (Rhino 8, 8.28.26041.11002, Git hash:master @ b7874a05a6982d0419fcc4f6009b510b48a09cb3)
License type: Educational, build 2026-02-10
License details: Cloud Zoo
Apple macOS Version 26.3 (Build 25D125) (Physical RAM: 32GB)
Mac Model Identifier: MacBookPro18,2
Language: en
.NET 8.0.14
Metal GPU Family Apple 7
Metal GPU Family Common 3
Metal GPU Family Mac 2
Graphics processors
Apple M1 Max
Color LCD (1728 x 1117 @ 120.00Hz)
GPU Vendor: Apple
USB devices
None
Bluetooth devices
None
Third party kernel extensions
None
Third party plugins
/usr/lib/swift/libswiftCore.dylib
/usr/lib/swift/libswiftObjectiveC.dylib
/usr/lib/swift/libswiftCoreFoundation.dylib
/usr/lib/swift/libswiftDarwin.dylib
/usr/lib/swift/libswiftDispatch.dylib
/usr/lib/swift/libswiftIOKit.dylib
/usr/lib/swift/libswiftSystem.dylib
/usr/lib/swift/libswiftXPC.dylib
/usr/lib/swift/libswift_Builtin_float.dylib
/usr/lib/swift/libswift_Concurrency.dylib
/usr/lib/swift/libswift_DarwinFoundation1.dylib
/usr/lib/swift/libswift_StringProcessing.dylib
/usr/lib/swift/libswiftos.dylib
/usr/lib/swift/libswiftDistributed.dylib
/usr/lib/swift/libswiftObservation.dylib
/usr/lib/swift/libswiftSynchronization.dylib
/usr/lib/swift/libswiftOSLog.dylib
/usr/lib/swift/libswiftsimd.dylib
/usr/lib/swift/libswift_RegexParser.dylib
/usr/lib/swift/libswiftMetal.dylib
/usr/lib/swift/libswiftQuartzCore.dylib
/usr/lib/swift/libswiftUniformTypeIdentifiers.dylib
/usr/lib/swift/libswiftAccelerate.dylib
/usr/lib/swift/libswiftCoreImage.dylib
/usr/lib/swift/libswiftCoreAudio.dylib
/usr/lib/swift/libswiftCoreMIDI.dylib
/usr/lib/swift/libswift_DarwinFoundation2.dylib
/usr/lib/swift/libswift_DarwinFoundation3.dylib
/usr/lib/swift/libswiftCompression.dylib
/usr/lib/swift/libswiftCoreLocation.dylib
/usr/lib/swift/libswiftRegexBuilder.dylib
/usr/lib/swift/libswiftCoreMedia.dylib
/usr/lib/swift/libswiftAVFoundation.dylib
/usr/lib/swift/libswiftNaturalLanguage.dylib
/usr/lib/swift/libswiftMLCompute.dylib
/usr/lib/swift/libswiftCoreGraphics.dylib
/usr/lib/swift/libswiftFoundation.dylib
/usr/lib/swift/libswiftSwiftOnoneSupport.dylib
/usr/lib/swift/libswiftsys_time.dylib
/usr/lib/swift/libswiftSpatial.dylib
/usr/lib/usd/libusd_ms.dylib
/usr/lib/swift/libswift_errno.dylib
/usr/lib/swift/libswiftIntents.dylib
/usr/lib/swift/libswiftVideoToolbox.dylib
/usr/lib/swift/libswiftCoreMediaIO.dylib
/usr/lib/swift/libswiftCallKit.dylib
/usr/lib/swift/libswiftPassKit.dylib
/usr/lib/swift/libswiftAppleArchive.dylib
/usr/lib/updaters/libAppleTconUARPUpdater.dylib
/usr/lib/updaters/libT200Updater.dylib
/usr/lib/swift/libswiftDemangle.dylib
/usr/lib/swift/libswiftGLKit.dylib
/usr/lib/swift/libswiftMetalKit.dylib
/usr/lib/swift/libswiftModelIO.dylib
/usr/lib/swift/libswiftSceneKit.dylib
/usr/lib/swift/libswiftExtensionFoundation.dylib
/usr/lib/swift/libswiftGameplayKit.dylib
/usr/lib/swift/libswiftSpriteKit.dylib
/usr/lib/swift/libswiftMapKit.dylib
Rhino plugins that do not ship with Rhino
/Users/shooner/Library/Application Support/McNeel/Rhinoceros/packages/8.0/Corgi/0.6.3.0/Corgi.rhp "Corgi" 0.6.3.0
/Users/shooner/Library/Application Support/McNeel/Rhinoceros/packages/8.0/Corgi/0.8.6/net7.0/Corgi.rhp "Corgi" 0.8.6.0
Rhino plugins that ship with Rhino
/Applications/Rhino 8.app/Contents/Frameworks/RhMaterialEditor.framework "Renderer Development Kit" 8.28.26041.1002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/Commands.rhp "Commands" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/PlugIns/NamedSnapshots.rhp "Snapshots" 8.28.26041.1002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RDK_EtoUI.rhp "RDK_EtoUI" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/MeshCommands.rhp "MeshCommands" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoRenderCycles.rhp "Rhino Render" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCycles.rhp "RhinoCycles" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/PlugIns/AnimationTools.rhp "AnimationTools" 8.28.26041.1002
/Applications/Rhino 8.app/Contents/PlugIns/SectionTools.rhp "SectionTools" 8.28.26041.1002
/Applications/Rhino 8.app/Contents/PlugIns/Displacement.rhp "Displacement" 8.28.26041.1002
/Applications/Rhino 8.app/Contents/PlugIns/PanelingTools.rhp "PanelingTools" 8.28.26041.1002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoDLR_Python.rhp "IronPython" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/GrasshopperPlugin.rhp "Grasshopper" 8.28.26041.11002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCodePlugin.rhp "RhinoCodePlugin" 8.28.26041.11
bold font issues mre.3dm (3.0 MB)
vector output.pdf (145.3 KB)
raster output.pdf (236.5 KB)