Unreal Engine Issues

Initial Modules are clamped to a 0 to 1 time range

The Initial Modules appear to be clamped to a zero to 1 time frame since 4.8 was released. Projects that are converted from 4.7.6 will have correctly working particle systems, but adding a new part ...

FBatchedElements::Draw - OrthoZoomFactor can be reset to 1.0f if Line.bScreenSpace is ever false

A licensee has reported that the Draw function in BatchedElements.cpp can set the OrthoZoomFactor (not a local variable) to 1.0f if Line.bScreenSpace is ever found to be false. The line this can oc ...

Niagara Mesh Renderer causes GPU hang on IOS 13.4.1

Launcher Crashes after updating from 4.5.1 to 4.6.1

Launcher Crashes after updating from 4.5.1 to 4.6.1. When opening Launcher user receives the following error message: MachineId:5594134C496ADEDBDA8928BF9C26FCA5 EpicAccountId:7d0bd770cd564683863553 ...

Unable to select foliage by left clicking after 1.5 k foliage meshes placed

When using the foliage tool, once the mesh count reaches around 1.5k and higher you will be unable to select individual meshes by using the mouse. The lasso tool and the select all tool work as inte ...

Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions

Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions and the identified cause is wrong indexing. Once a GC breaks, it's fragments, when big enough, are creating islands in ...

UAnimSequenceBase::GetNumberOfFrames off by 1

Creating a montage from a default frame rate and rate scale sequence reports 1 less frame than the sequence. The difference is a result of UAnimSequence overriding UAnimSequenceBase::GetNumberOfFram ...

Materials with Subsurface Profile not affected by Opacity value

A material with Shading Model set to Subsurface Profile is no longer affected by Opacity value in 4.17, 4.18, and 4.19 (Main) but was previously working as intended in 4.16. This is a regression. ...

ContentExamples PostProcessing map demo 1.13 post process volume screen percentage is not low enough

The post process volume in ContentExamples for Screen Percentage is set to 90 which is too high to notice a difference. The documentation has it at 25 here: https://docs.unrealengine.com/latest/INT/ ...

Radial Impulse does not affect objects unless it can affect both center of mass and collision if center of mass is outside of collision

Firing a radial impulse does not affect an object whose center of mass is located outside of its' collision unless both the center and the collision are simultaneously affected by the same force. ...