Bug description
I am using selbrush command.
In the first image I am painting the mesh faces that I want to select. These are the faces visible on the front surface of the mesh.
The expected behavior is that only the visible faces being painted are selected.
However, the command selects both the faces I am painting and the faces located behind them, as if the selection were passing through the mesh.
This happens even though the “Select Through Object” option is disabled. This option should prevent the selection from passing through the object, but in this case it has no effect.
The second image is slightly offset only to make the issue easier to see and to show that the faces behind the visible ones are also being selected.
here I paste the system info:
Rhino 8 SR28 2026-2-10 (Rhino 8, 8.28.26041.11002, Git hash:master @ b7874a05a6982d0419fcc4f6009b510b48a09cb3)
License type: Educational Lab License, build 2026-02-10
License details: Cloud Zoo
Apple macOS Version 15.7.3 (Build 24G419) (Physical RAM: 48GB)
Mac Model Identifier: Mac15,9
Language: en-US (MacOS default)
.NET 8.0.14
Metal GPU Family Apple 7
Metal GPU Family Common 3
Metal GPU Family Mac 2
Graphics processors
Apple M3 Max
Color LCD (2056 x 1329 @ 120.00Hz)
S23C550 (1920 x 1080 @ 60.00Hz)
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_StringProcessing.dylib
/usr/lib/swift/libswift_errno.dylib
/usr/lib/swift/libswift_math.dylib
/usr/lib/swift/libswift_signal.dylib
/usr/lib/swift/libswift_stdio.dylib
/usr/lib/swift/libswift_time.dylib
/usr/lib/swift/libswiftos.dylib
/usr/lib/swift/libswiftsys_time.dylib
/usr/lib/swift/libswiftunistd.dylib
/usr/lib/swift/libswiftDistributed.dylib
/usr/lib/swift/libswiftObservation.dylib
/usr/lib/swift/libswiftSynchronization.dylib
/usr/lib/swift/libswiftMetal.dylib
/usr/lib/swift/libswiftOSLog.dylib
/usr/lib/swift/libswiftQuartzCore.dylib
/usr/lib/swift/libswiftUniformTypeIdentifiers.dylib
/usr/lib/swift/libswiftsimd.dylib
/usr/lib/swift/libswiftRegexBuilder.dylib
/usr/lib/swift/libswift_RegexParser.dylib
/usr/lib/swift/libswiftCoreAudio.dylib
/usr/lib/swift/libswiftCryptoTokenKit.dylib
/usr/lib/swift/libswiftAVFoundation.dylib
/usr/lib/swift/libswiftCoreLocation.dylib
/usr/lib/swift/libswiftCoreMIDI.dylib
/usr/lib/swift/libswiftCoreMedia.dylib
/usr/lib/swift/libswiftCoreImage.dylib
/usr/lib/swift/libswiftAccelerate.dylib
/usr/lib/swift/libswiftNaturalLanguage.dylib
/usr/lib/swift/libswiftMLCompute.dylib
/usr/lib/swift/libswiftCompression.dylib
/usr/lib/swift/libswiftDataDetection.dylib
/usr/lib/swift/libswiftCoreGraphics.dylib
/usr/lib/swift/libswiftFoundation.dylib
/usr/lib/swift/libswiftSwiftOnoneSupport.dylib
/usr/lib/usd/libusd_ms.dylib
/usr/lib/swift/libswiftIntents.dylib
/usr/lib/swift/libswiftSpatial.dylib
/usr/lib/swift/libswiftPassKit.dylib
/usr/lib/swift/libswiftAppleArchive.dylib
/usr/lib/swift/libswiftDemangle.dylib
/usr/lib/swift/libswiftVideoToolbox.dylib
/usr/lib/swift/libswiftGameplayKit.dylib
/usr/lib/swift/libswiftSpriteKit.dylib
/usr/lib/swift/libswiftGLKit.dylib
/usr/lib/swift/libswiftMetalKit.dylib
/usr/lib/swift/libswiftModelIO.dylib
/usr/lib/swift/libswiftSceneKit.dylib
/usr/lib/swift/libswiftMapKit.dylib
/Users/tiz/Library/Application Support/McNeel/Rhinoceros/packages/8.0/BotchaXRhino/2026.0.0/libBotchaNative.dylib
/usr/lib/log/liblog_network.dylib
Rhino plugins that do not ship with Rhino
/Users/tiz/Library/Application Support/McNeel/Rhinoceros/packages/8.0/BotchaXRhino/2026.0.0/BotchaRhino.Rhino8.rhp “BotchaRhino.Rhino8” 2026.0.0.0
/Users/tiz/Library/Application Support/McNeel/Rhinoceros/packages/8.0/RhinoBanana/0.1.10-beta.7/RhinoBanana.rhp “RhinoBanana” 0.1.10.0
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/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” 8.28.26041.11002
