Draw debug depth priority oddities

Rendering - Feb 18, 2020

Came across a few oddities with draw debug. DrawDebugSolidBox ignores the DepthPriority parameter and appears to always draw in World. In the screenshot the sphere is drawn on top of the mesh, the ...

Mac - Unable to drag-drop import with special characters

Tools - Feb 18, 2020

Dragging + Dropping a file with special characters to import on Mac results in Error. "LogFactory: Error: Can't find file 'filepath' for import" Workaround: Click 'Import' in content browser inste ...

Complex collision mesh might lose its collision in the editor

Tools - Feb 18, 2020

This is affected by loading order. In the case, display mesh was loaded firstly and try to build collision mesh form complex collision mesh asset. But the collision mesh didn't finished to make Ren ...

Physics Constraint Actor Won't Disable Collision Between Two Actors That Are Already Colliding

Physics - Feb 17, 2020

Meshes that are colliding that are set as constraint actors don't follow the Physics Constraint Actors "Disable Collision" parameter if they are colliding prior to being set as constrained actors. ...

Using Collision in Niagara without an Update Age module will prevent any particles from spawning

Rendering - Niagara - Feb 17, 2020

Using Collision without Update Age will prevent any particles from spawning. In Collision Query and Response DataInstance.Alive has a default value of false. If no other module sets DataInstance.Ali ...

D3D12RHI crash using laptops internal display

Rendering - RHI - Feb 17, 2020

Running the engine with DX12 enabled on MSI GS75 Stealth 9SF results in a D3D crash when using the internal display on the laptop. *Note: Unable to reproduce the crash. The user receiving the cra ...

PIE crash due to non-empty ULevel::DestroyedReplicatedStaticActors array

Networking - Feb 17, 2020

It's possible to end up in a state where some entries were saved in ULevel::DestroyedReplicatedStaticActors, which causes a crash when PIE starts up. I'm not sure how entries could end up in this l ...

Adding multiple streaming levels to the world in a single frame can potentially exceed time slicing budget

Gameplay - Feb 17, 2020

If a level uses most of the time slicing budget but not all, the next level in the list will begin to load and could potentially use the full time slicing budget. In the worst case scenario, you cou ...

Sound Quality is worse after import

Audio - Feb 17, 2020

After importing a sound file, it's sonic characteristics are changed and the sound is not the same as the original. This leads to inconsistency. The sound is the same with Compression set 100. Two ...

Steam VR - Wrong Key returned on Action Mapping

XR - Feb 17, 2020

VR InputAction returns wrong Key. Did not reproduce with Rift Confirmed in 4.26 MAIN @ CL 11451261 ...