Unreal Engine Issues

Particles Do Not Obey Lighting Channels

Particle systems ignore lighting channels - no matter what channel a light is on (even if no channels are selected), it will affect lit particles. Changing lighting channels on the particle itself h ...

Float Curve evaluation may yield completely wrong results due to floating-point precision issue

Note: This is possibly related to [Link Removed]. For some inputs, function UE::Curves::WeightedEvalForTwoKeys() inside file "CurveEvaluation.cpp" can incorrectly return the value of the first key, ...

Switching a code project created in a source-built Engine to use the binary Engine results in files being deleted from the binary Engine installation

If a code project is created in an Engine built from source code, and then it is switched to use a binary Engine installed by the Launcher, building the project in Visual Studio will result in numer ...

Broken hair material with light function

Hair Materials do not react to Light Functions in the same way as other Materials. There is a visual difference between a Directional Light at 1 lux with no Light Function and a Directional Light at ...

"Enable Stencil Test" Mobile crash

A material with 'enable stencil test' will crash on mobile. Enable Stencil Test is a new option in materials as of 4.23 Confirmed with OpenGL 3.1 + 2 and Vulkan on Pixel XL Also Crashes on iOS ...

Behavior of Speed Up/Down parameter of Auto Exposure are different.

Brend/Swtch multi PostProcessVolume to handle Auto Exposure with same Speed Up/Down parameter but behavior of Speed Up/Down parameter of Auto Exposure are different. Scene with. Unbounded PostProce ...

Manually importing LODs are rotated 90 degrees when using Transform Vertex to Absolute

When importing a Static Mesh if you use the default settings and then manually import any LODs for that static mesh they will be rotated by 90 degrees. I found that disabling Transform Vertex to A ...

Occasional 1-frame UMG render data corruption on Metal

Localization warnings when opening a new project in 4.8.1

There are a couple of warnings that show up in the output log that are dealing with localization when opening up a new project. ...

UE 4.25.1 Offline Installer Display Error

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