Hello,
I found a crash easy to reproduce on landscapes, v5.1.
Here the rep steps:
1 - Create a new empty map
2 - Create a landscape with “Sections per component” → “2x2 sections”
3 - Create a Physical Material asset
4 - Create a Material with “Landscape Physical Material Ouptut” node that always return the created Physical Material
5 - Assign the material to the landscape and all its landscape components
6 - Set Landscape’s “Collision Mip Level” to 1
7 - See the crash due to failed check
Here the log:
Assertion failed: CollisionSizeVerts * StepSize == SizeVerts [File:D:\build++UE5\Sync\Engine\Source\Runtime\Landscape\Private\LandscapeEdit.cpp] [Line: 1814]
UnrealEditor_Landscape!ULandscapeComponent::UpdateCollisionPhysicalMaterialData() [D:\build++UE5\Sync\Engine\Source\Runtime\Landscape\Private\LandscapeEdit.cpp:1814]
UnrealEditor_Landscape!ULandscapeComponent::UpdatePhysicalMaterialTasks() [D:\build++UE5\Sync\Engine\Source\Runtime\Landscape\Private\LandscapeEdit.cpp:1768]
UnrealEditor_Landscape!ALandscapeProxy::UpdatePhysicalMaterialTasks() [D:\build++UE5\Sync\Engine\Source\Runtime\Landscape\Private\Landscape.cpp:5198]
UnrealEditor_Landscape!ULandscapeSubsystem::Tick() [D:\build++UE5\Sync\Engine\Source\Runtime\Landscape\Private\LandscapeSubsystem.cpp:163]
UnrealEditor_Engine!FTickableGameObject::TickObjects() [D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\Tickable.cpp:153]
UnrealEditor_Engine!UWorld::Tick() [D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1606]
UnrealEditor_UnrealEd!UEditorEngine::Tick() [D:\build++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1680]
UnrealEditor_UnrealEd!UUnrealEdEngine::Tick() [D:\build++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:517]
UnrealEditor!FEngineLoop::Tick() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5367]
UnrealEditor!GuardedMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:202]
UnrealEditor!GuardedMainWrapper() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:107]
UnrealEditor!LaunchWindowsStartup() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:244]
UnrealEditor!WinMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:282]
UnrealEditor!__scrt_common_main_seh() [D:\a_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll
Thank you,
Giacomo Marchetti