Unreal Engine Issues

ISM + WPO = broken motion vectors?

Instanced Static Meshes will have incorrect velocity if a Material uses World Position Offset. Fixed WPO in a material causes significant velocity on the ISM. This was also replicated in //UE5/Rele ...

ForEachLoop does not save structure changes in the loop body

If a ForEachLoop node is used to cycle through an Array of Structures, using the Array Element output of the Loop node to set the members of the structure does not save the changed values. Workarou ...

Trying to set/change an element of a fixed-size TAssetPtr array in the Editor results in a crash.

Trying to set the value of an element of a fixed-size TAssetPtr array in the Editor results in the Editor crashing. This did not occur in 4.13. The attached callstack is from debugging the project ...

Collision outcome is different between PIE and Mobile Preview/Packaged Project.

When playing the user's project in editor vs Packaged, there has been different results for the enemies collision. When playing in PIE, you are able to fly through the enemies with no issues. When p ...

Problem with material layers using interpolator nodes

The Vertex Interpolator Material Expression appears to collapse separate instances from separate Material Layers, leading to visual artifacts when used. Also tested on UE5_Main, CL: 34200103 ...

Toggling a Spline component from an open/closed loop through bp's isn't reflected

Toggling a Spline component from an open/closed loop through bp's isn't reflected ...

Groom Hair Visual Issue with RBF Interpolation Enabled

When "RBF Interpolation" is enabled in the Groom settings, applying an Animation Sequence to a Skeletal Mesh that animates at a position far from the world origin causes the bound Groom shape to bec ...

Moving all the related assets to another folder at once leads to reference lost in the contents browser.

Moving all the related assets into another folder leads to reference lost. This can be tested out using ShooterGame project. Also you can find materials in the skeletal mesh lost its texture. This ...

Default value propagation of instance subobjects doesn't work consistently

Blueprint - Crash when a function takes an event as a parameter

Looks like maybe we aren't replacing the source delegate function (SignatureFunction) reference on the UDelegateProperty after recompiling the class - the function's owner name has the TRASHCLASS pr ...