Unreal Engine Issues

Tessellation Flicker When Viewed from a Distance

Tessellated objects when viewed from afar flicker. When spawned into QA-Materials the player is the perfect distance away from the tessellated object for the cube to flicker. Found in both Binary 4 ...

Deactivate Then Activate Ribbon Emitter Causes Flicker

When setting a particle system to be active after deactivating the remaining particles still floating in the air from earlier will flicker. This is harder to reproduce when smooth frame rate is enab ...

Nav Mesh Not Generating on Static Mesh Created From BSP

Nav Mesh is not being generated on a static mesh that was converted from a BSP. Found in 4.13.1. Reproduced in 4.12.5 and 4.14 Main CL 3156733 Attached is a screenshot showing the difference betw ...

Animation Interpolation will not occur if the Evaluation Rate is set at the same value as skipped frames

When an animation is skipping frames, interpolation will not occur if the Max Evaluation Rate is set to the same number as the number of frames being skipped (or 1 frame higher). The Eval Rate will ...

Exposure Is More Extreme In High-End Mobile Preview Modes

In high-end mobile preview modes the exposure will return much more exaggerated results. This is related to the new default tone mapper settings since changing r.TonemapperFilm to 0 solves the issue ...

Spectator Pawn cannot be added to level by dragging into viewport

Spectator Pawn cannot be added to level by dragging into viewport but can be added by using place actor in the level viewport. Regression: This issue occurs in 4.13.2, 4.14.3, and 4.15.1 of the Bin ...

Packaging a Project With Nativize Blueprints Enabled Fails With Setter for an Array of Classes

Packaging failure occurs with nativize blueprints enabled when you have an array of classes and you try to set it with an array from an instance of a native C++ class. Found in 4.15.1. Reproduced i ...

Crash occurs while clicking through the Landscape Overview Tutorial

Crash occurs while progressing through the Landscape Overview tutorial, after the step "After pressing the Create Button, your level should now have a Landscape Actor inside of it" This is a regres ...

WorldContextObject is null in BP function library

Unknown by landscape material warning logspam when launching onto Android/HTML5/iOS/tvOS

Unknown by landscape material warning logspam when launching onto Android Also occurs in Main @ CL 3792526 --Reproduces in //UE4/Release-4.18 at CL 3792614 --Reproduces in //UE4/Release-4.18(.1) at ...