Unreal Engine Issues

Each changing collision response increases FPhysXTask count

calling SetCollisionResponseToChannel or something similar, FPhysXTask will ever increase . Finally, it causes serious frame rate drop. That count can be reset by calling RecreatePhysicsState. ...

Textures/Materials morphed when BSP is scaled

When you place a texture onto a BSP and resize the BSP, the material/texture is skewed to the size of the BSP rather than staying at the scale it originally was. Work Around: You can resolve this b ...

Editor crashes upon PIE unless tick is disconnected and reconnected

Project crashes if user presses compile or PIE unless they first disconnect and reconnect event tick within blueprint component BP_BuildStage. Frequency: 4/4 CrashReporter: [Link Removed] ...

Editor crash when compiling a blueprint containing `SetAvoidanceEnabled` call in construction script.

The Dynamic setting for the Nav Mesh generation causes a large dip in frame rates

When using a fairly large level the Dynamic setting for the Nav mesh generation can cause large drops in frame rates. (Example: 120 fps when running Dynamic with Modifiers only to 42 fps with Dynami ...

Application fails on HTML5

User is unable to launch his project onto HTML5 without any errors. The game doesn't work as an application, merely a background image. Works perfectly on Windows. ...

First Person Game Mode isn't set correctly for new default levels

When creating a new default level in the first person template, the default game mode is set to 'pawn' rather than 'first person character'. ...

Crash when moving a sprite imported as part of a spritesheet to another folder if the sprite names had invalid characters

Attempting to move any of the sprites created from this .json to another folder from within the Content Browser crashes the project. CRASHREPORT: 442758 ...

Visual glitches on Mac OS X using an Intel GPU while playing HW accelerated H264 video

This looks to be a system driver bug, but logging here for transparency and future reference. It took me a long while to figure out that the key issue is a conflict during blit between UE4 and the H ...

OnDragDetected fires off with a single click for 3D widgets

When Using the On Drag Detected on a 3D widget, the drag function fires off on a single click (No dragging necessary) ...