Unreal Engine Issues
Unreal Engine Issues
FTransform(ENoInit) ensures in Debug on mobile platforms
UE - Foundation - Core - Sep 25, 2018As of 4.20, ENABLE_NAN_DIAGNOSTIC is now enabled in all Debug configurations. However, this does not work well with the TransformNonVectorized that is used on platforms like android. If this combina ...
Landscape Paint Layers will not scroll to the end when using mouse wheel
UE - LD & Modeling - Terrain - Landscape - Sep 28, 2020In a normal detail panel, each element has its own SDetailSingleItemRow and are mostly uniformly sized with some exceptions of having a few bigger rows (i.e. asset pickers). However, these layers ar ...
HiResScreenshot has incorrect masking when screenshot resolution scale does not match the viewport.
UE - Rendering - Architecture - RHI - Sep 6, 2021After a bit of investigation, the way to fix this would be to modify MergeMaskIntoAlpha to pass in the actual resolution scale and the requested size, and only mask the overlapping pixels. Currently ...
Nanite displacement on landscapes not rendering on 5700XT
UE - Graphics Features - Nanite - Mar 27, 2024This only happens on a 5700XT, tested this on the 7900XT and the issue did not occur Initially reported on the Preview 1 forums: https://forums.unrealengine.com/t/unreal-engine-5-4-preview/1763516 ...
MATERIAL_SHADINGMODEL_TOON macro is not propagated to the substrate tool BSDF material on a DDC hit
UE - Rendering - Features - Shading Models - Jul 27, 2026On a DDC hit, the SubstrateMaterialBsdfFeatures variable restored into MaterialCompilationOutput is not copied into SubstrateTranslatorData.SubstrateMaterialBsdfFeatures, which is referenced by the ...
Inconsistent mobility when converting selected actors to a blueprint
UE - Gameplay - Blueprint - Jan 6, 2015Noticed when replying to a user on the forums (link included) When using the "Convert to Class Blueprint" feature in the level editor to create a blueprint from the selected actors, the created blu ...
Special characters in the Bundle Display Name are not showing up on device
UE - Platform - Mobile - Aug 20, 2015Bundle Display Names support UTF-8 characters. However, the iOS tool chain is not handling these correctly. Error when you try to package a project with & in the display bundle name, whether it's b ...
Smoothing landscape removes landscape collision in smoothed areas
UE - LD & Modeling - Terrain - Landscape - Apr 27, 2016Smoothing user's landscape breaks collision, causing player to fall through the ground at points that have been smoothed. Resampling landscape fixes the error until smooth tool is used again. Regr ...
Game projects that rely on legacy include paths are not compatible with Blueprint nativization.
UE - Gameplay - Blueprint - Nov 10, 2018Using legacy-style #include paths in a game project is allowed by UBT by default, but it's currently not compatible with Blueprint nativization, as it does not account for this possibility. Current ...
[Input] Switching levels destroys auto-created Input Component which breaks emitUIInteraction
PixelStreaming - Feb 12, 2019We auto-create a PixelStreamingInputComponent which handles the input coming from JavaScript's emitUIInteraction. This works in a UE4 app with a single level, but it seems that if you change levels ...