Unreal Engine Issues

Dynamically Created Hierarchical Instanced Static Mesh Component Reset with Wind Directional Source

A HISMC (Hierarchical Instanced Static Mesh Component) created dynamically through blueprints has its simulation reset by the Wind Directional Source. "The HISMC needs to get spawned from an Actor ...

DeprojectScreenPositionToWorld has inaccurate behavior in VR

Calling DeprojectScreenPositionToWorld while in VR mode does not project from the center of the Oculus view. Using the results of the call with a line trace will show the line coming off center fro ...

Printing the result of the 'Get Move Ignore Actors' node will crash the editor

Printing the result of the 'Get Move Ignore Actors' node will crash the editor. The Licensee found the issue while exploring a workaround for this JIRA:https://jira.ol.epicgames.net/browse/UE-14734 ...

Linker errors when deriving from ADecalActor in game

Cannot derive from ADecalActor in your game modules as not all of the functions are exposed and you get linker errors. ...

LineTraceSingleByChannel returns a hit for any object it hits, regardless of whether or not that object has the specified collision channel set.

The collision channel specified in LineTraceSingleByChannel does not appear to be taken into account when the trace is performed. Instead of ignoring any objects that are not set to that channel, an ...

Collapsed graphs do not correctly show execution flow while debugging blueprints

Re-enable rendering categories on UMaterialBillboardComponent

Looks like the thread died in IM. I think we should re-enable the categories that were removed in 4.6. ...

The 'Wind' Material Node Function Not Accepting Vector4 Parameter

In order to use the 'Wind' material function correctly the function states you need to reference the 'Wind Directional Source' actor. The only way to do this within the material editor and through b ...

Adding new elements to an array in code does not update in a class based blueprint on compile

When adding elements to an array inside a code class, blueprint instances of the class do not have their array updated after a hot reload. ...

Selecting a Struct variable when binding a property in UMG can cause an infinite number of selections

If a struct with a Texture 2D variable is chosen when creating a binding for the brush it can create an infinite number of windows. Note: If done enough the editor will crash ...