Unreal Engine Issues

Nanite mesh shadows not updating when CSMCaching enabled

A Nanite primitive casting a CSM shadow on another Nanite primitive with "Cast Shadows" disabled, will have it's shadow disappear completely when r.Shadow.CSMCaching = 1. ...

Interchange Import - Import model with custom collision prevents socket to be imported

I would like parity with legacy: 1) only one material 2) socket to be imported Box_Socket file imports same in legacy and interchange: it is just box and socket without collision. ...

UDN Bug: ASTC compression becomes greyscale

Bug reported at https://udn.unrealengine.com/s/question/0D5QP00000tOpXN0A0/using-mutable-plugin-results-in-greyscale-textures-on-android-xr?fromCase=1 ...

Volume artifacts (Bleeding)

Components defaults not updating on hot reload

Certain values, when changed in code, are not updated in a hot reload. For example, changing the Target Arm Length of a spring arm component will updated after hot reload, but changing the Scale do ...

GlobalShaderCache file is missing when Direct X 11 SM5 is disabled for packaging

When trying to launch a .exe after disabling SM5 in the project settings, an error will appear. The global shader cache file ../../../../Engine/GlobalShaderCache-PCD3D_SM5.bin is missing. ...

Adding a Structure BP parameter with a Enum BP as a member to a Niagara Module Script crashes the engine

Adding a parameter of type structure bp which references an enum as a value to a module script crashes the engine. This issue is also occurring in 4.27. ...

Crash when removing Blueprint function

The Editor crashes whenever the reference to the "DeleteThisFunction" function is deleted. ...

Scroll widget into view will cause a crash is given a null value

If the user uses "Get child at" with an invalid index and then hooks up the return value to a "Scroll Widget into View" node's "Widget to Find" pin it will cause a crash ...

Scene capture allocate internal render target