Unreal Engine Issues

ISM Component in an instanced BP does not take into account changes to NumCustomDataFloats from the BP class

PerInstanceSMCustomData is bulk serialized and doesn't get changed on the BP instance when changing NumCustomDataFloats, possibly causing out of bounds array access leading to a crash. Possible sol ...

FMaterialResource::IsDualBlendingEnabled bug

The user has a proposed fix for this in the case. FMaterialResource::IsDualBlendingEnabled needs the following modification that includes MaterialInstance check: bool bMaterialRequestsDualSourceBle ...

Auto Exposure Compensation Curve issue when switching from Histogram to Manual

When switching the Camera's Exposure Metering Mode from Histogram to Manual, there is a single-frame flash. The Licensee has a proposed code change that would fix this issue. Also found in 5.4, CL 3 ...

Crash when altering the values of a custom struct element in a Tmap

If the values of the elements in a Tmap are altered for a Tmap that is using a custom struct, the editor will crash on compile. ...

FFieldPath resolution doesn't handle redirection

A licensee has found that redirectors don't apply to FFieldPath. We should integrate it with the following changes:It needs better error handling (looks like it could infinitely recurse),The change ...

4.6 Delegate error in Blueprints

When looking into the bd_hud_scoring and bd_rules_maze blueprints in the users project (Provided below), there are nodes that are throwing errors. If you press compile, the errors go away and the co ...

Pasting nodes into level blueprint crashes editor

Level sequence updates more than once per frame when content editors are open

When content editors are open, they cause sequencer to be updated more than once per frame. This causes animations running in PIE to play faster than expected. Licensee provides code for a potential ...

Blueprint Implementable Events and Event dispatchers with the same name break the event dispatcher.

Creating an event dispatcher and BlueprintImplementableEvent function with the same names causes a signature conflict inside the blueprint. The event dispatcher is then broken as it cannot be delet ...

REGRESSION: HierarchicalInstancedStaticMeshComponent LOD transitions are broken in 4.9 and Main

While testing another fix I noticed HISM LOD transitions are not working in Main or 4.9 branch. There is no screen-door effect and multiple LODs seem to be rendering simultaneously compared to 4.8. ...