Unreal Engine Issues

FMath::TruncToInt() may result in incorrect data being returned in instances when a Double is passed in containing a large integer value

The FMath::TruncToInt() function takes a float parameter, but some calls to this function pass in a double value. For most use cases, this will probably work fine. However, if the integer values are ...

Unable to set default of elements for an array of component references through blueprints

If a user creates an array to store references to a certain type of component, the existing components will not be available to be selected when they are setting the default values of the elements. ...

Static meshes in a particle system are not affected by decals

There is an issue where Static meshes in a particle system are not affected by decals, It is unsure if this is intentional behavior or not. This issue does not appear to be a regression Versions ...

Crash after generating HLODs for merged meshes that have all triangles culled

Project fails to compile if UFUNCTION parameter shares a name with a previously defined UPROPERTY variable

If the name of a UFUNCTION parameter matches the name of a previously defined UPROPERTY variable, the project will fail compile due to the following reason: Function parameter: '[Variable/Paramter ...

Crash when using Mesh Reduction on ScotsPine_01 for LOD3

A crash occurs when trying to use the Mesh Reduction tool for the ScotsPine_01 static mesh from the Open World Demo collection. The assets from this project are usually very processor heavy due to ...

Compiling after placing an unconnected return node does not yield compiler results nor warnings

I noticed this while executing this in [Link Removed]. ...

Passing array from blueprint to C++ causes performance drop

Passing a blueprint array as an argument to a C++ function causes a spike in Frame rate, game and GPU. This spike is noticeable when using UnitGraph. Attached screenshots show difference in UnitGr ...

UPROPERTY specifiers are not reflected for FTransform

Defining an FTransform in code with VisibleAnywhere, BlueprintReadOnly allows the variable to still be edited per instance placed in the level. ...

Multiple simultaneous keyboard event inputs not received

User Submitted Bug Some keys are not registered when pressed with combination of others. ...