Unreal Engine Issues

Setting spline in Niagara Override Parameters corrupts system after closing level

The USplineComponent appears to be corrupted. It will pass the null check, but operations done on the data cause the engine to crash. (See the linked UDN for more details) ...

Spline mesh can not cast shadow when raytracing enabled.

Cook errors with landscape cross-level spline meshes

Licensee is using a modified engine but has a workaround, we need to verify that the same doesn't happen in vanilla UE4 and fix if it does. ...

Landscape Spline meshes lose vertex color paint after moving to another level

UDN: https://udn.unrealengine.com/questions/432735/%E5%9C%A8%E6%B5%81%E5%85%B3%E5%8D%A1%E4%B8%AD%E6%8F%8F%E7%94%BB%E6%A0%B7%E6%9D%A1%E6%9B%B2%E7%BA%BF%E4%B9%8B%E5%90%8E%E5%A6%82%E6%9E%9C%E6%8A%8A%E ...

LandscapeSplineMeshesActor instances not deleted when World Partition is disabled

When landscape splines exist in a WP level, LandscapeSplineMeshesActor instances are created to allow streaming of splines. In a non-WP level, splines are components of the landscape actor. When a W ...

Editor Crashes When Enabling Closed Loop on Spline in Blueprint

Editor is crashing when setting closed loop in the construction script of a blueprint. This did not occur in 4.12.5 following the same repro, this is a regression. ...

AreaNavModifiers generated by SplineNavModifierComponent have the component-to-world transform incorrectly applied twice

USplineNavModifierComponent was made available in UE 5.4. It generates several FAreaNavModifier instances covering a region with a certain thickness around a USplineComponent, and worked correctly u ...

Spline mesh component doesn't draw complex collision geometry correctly

FBX import of FocalLength with Spline Tangents setting does not import correctly

Curves with Auto tangents settings are imported correctly. test_aaa_AutoTangents.fbx ...

Long thin splines with wide tangents do not generate correct collision geometry

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