Unreal Engine Issues

Template function TSparseArray::PointerToIndex does not compile

Error:  C:\Program Files\Epic Games\UE_4.25\Engine\Source\Runtime\Core\Public\Containers/SparseArray.h(778): error C2440: '-': cannot convert from 'const TSparseArrayElementOrFreeListLink<TAlignedBy ...

Material Editor: Material Expression Constant Node Preview Incorrect Color

Cracks in polygons in BSP Optimize

This problem also occurs when the Create Convex Polygons checkbox is checked in the Pen tool. ...

SingleLayerWater with PixelDepthOffset gives wrong refraction

We can see refraction gets distorted after we have a bigger PDO value, and it's not because the depth is more shallow, but looks like some kind of scene color texture lookup error. Also, not sure i ...

Replicated component destruction not reaching client

See the attached UDN for more information and a sample project reproducing the issue. This issue seems to happen due to a specific order of events. First, the component is destroyed, and garbage col ...

Grass does not show up when I override the Material of LandscapeComponent.

Regression checked in //UE4/Release-4.26.2 CL 15973114 the issue is not reproduced thee ...

Third Person C++ Template Package Fails to Launch with Assert Error Window

Occurs 3/3 times. Third Person C++ Windows package crashed on launch with Assert Error Window (see attached screen capture) Regression occurs: Repro'ed in //UE4/Release-4.27 EGL Live @ CL18429761 ...

Instanced Impostors Render Black in UE5 editor

Cannot set background color for UI Domain material preview

Applied external forces to vehicles may be nullified by sleeping

If Entering sleeping state and applying external force are same time, the external force is nullified and the vehicle stops immediately. p.Chaos.Solver.SleepEnabled 0 or __ setting SleepLinearVel ...