Linux Editor creates multiple installation identifiers for itself if Install.ini is removed

Platform - Linux - Sep 17, 2020

The first ID contains brackets and a trailing slash while the second does not. Alternatively if the engine is opened with a .uproject argument no ID will be created until the "Open Project" dialog i ...

High Precision Tangent Basis & Use Full Precision UVs on Skeletal Meshes reset after reimport

Tools - Datasmith Importer - Sep 17, 2020

Reimporting a skeletal mesh causes "use high precision tangent basis" & "use full precision UVs" to reset and no longer being applied to the mesh. Reported and tested in version 4.25.3(CL 13942748) ...

Crashing when Google Resonance is used with Soundfield Submix

Audio - Sep 17, 2020

When PIE'ing and stopping PIE with Google Resonance in use, the engine crashes after PIE session ended. Crash appears as a result of the Soundfield Submix's Soundfield Encoding Format being set to ...

Crash when quick binding a function in a class that extends LevelSequenceDirector

Anim - Sequencer - Sep 16, 2020

The purpose was to create a Level Sequence Director inheritance class so that the same event could be reused in multiple sequencers. Attempting to quick-bind this base Level Sequence Director event ...

r.ShaderpipelineCache.StartupMode=0 does NOT work property

Platform - Mobile - Sep 16, 2020

r.ShaderpipelineCache.StartupMode=0 is a option for stop precompile using PSO Caching, but it doesn't work property. After CL-5837455, FShaderPipelineCache::ResumeBatching() is always called in FEn ...

Crash occurs when RayTracing.ExcludeDecals is enabled

Rendering - Ray Tracing - Sep 16, 2020

The cause of the crash is out-of-range access to the array. ExcludeDecals eliminates the mesh instance to which the decal material is assigned, but it seems that the MeshCommand has been registered ...

DrawDebugString display wrong position in PIE when changed display scale

Tools - Sep 16, 2020

The display position of the text in DrawDebugString is affected by the scale of the display. Should refer to the Project() of DebugCanvas (not Canvas). -  Suggest Code void AHUD::DrawDebugTextL ...

Crash occur when switching the Ray Tracing shadow function when only shadow is enabled in the Ray Tracing

Rendering - Ray Tracing - Sep 16, 2020

According to the licensee, this problem is caused by a variable inconsistency in Cvar. The cause seems to be the difference between the CVar reference when generating RayTracingSceneRHI and the CVa ...

Can not output the log that is "Category=LogActor, Verbosity=log"

Gameplay - Core - Sep 16, 2020

The LogActor is set to "CompileTimeVerbosity=Warning", so it cannot output more than the "Warning" level. ENGINE_API DECLARE_LOG_CATEGORY_EXTERN(LogActor, Log, Warning); Suggest the following  ...