Unreal Engine Issues
Unreal Engine Issues
[Audio Modulation] - Ensure is thrown when attempting to modulate a Source Effect at runtime
UE - Audio - Modulation - Sep 6, 2023Does *not* occur in editor. Only in standalone and runtime. Occurs when modulating Chorus or Bit Depth Also occurs in 5.2 and 5.3. I also noticed the test with this is supposed to set the chorus e ...
Cast enum to byte could occasionally break cook/resave in level BP
UE - Gameplay - Blueprint Compiler - Aug 27, 2020Workaround:The blueprint macro had a cast from the enum to an int and that was causing the issue, getting rid of the cast and just returning the enum and then changing all the places that were usin ...
Visual glitches on Mac OS X using an Intel GPU while playing HW accelerated H264 video
UE - Graphics Features - Dec 2, 2014This looks to be a system driver bug, but logging here for transparency and future reference. It took me a long while to figure out that the key issue is a conflict during blit between UE4 and the H ...
While a Custom Event's delegate pin is connected to anything its details are not visible in the Details panel
UE - Gameplay - Blueprint - Oct 27, 2015While a Custom Event's delegate pin is connected to anything its details are not visible in the Details panel. Tested with an empty reroute node as noted below as well as a Set Timer node. Reproduc ...
Timeline name changes do not propagate to related nodes
UE - Gameplay - Blueprint - Mar 17, 2015Timeline name changes do not propagate to related nodes. Refresh All does not rename nodes that reference the timeline, and Getters and Setters are no longer valid nodes. Reproduced in 4.7.2 binary ...
Blueprint Doesn't Show Components Added at Runtime
Tools - Nov 2, 2015When a custom component is added at runtime, it does not show up in the details panel when you select the blueprint that it has been added to. Found in 4.9.2 binary. Reproduced in 4.10 Preview 3 a ...
Atmosphere related scan line artifacts for Path Tracer with MGPU
UE - Graphics Features - Path Tracer - Feb 10, 2023There are two UDNs related to this issue. It makes the Path Tracer unusable with MGPU, with atmosphere enabled. I already have a one-line fix implemented and tested. The atmosphere scan line arti ...
Open Formats: Interchange Import PIE - Importing static mesh while a PIE session is running permanently breaks nanite on the asset
UE - Editor - Open File Formats - Mar 12, 2025Importing a Static Mesh during PIE can cause it to never enable Nanite, even if it reports that Nanite is enabled. To re-enable Nanite on the mesh, the asset needs to be deleted and imported again ...
HLSLCC crashed on parsing UAV related instruction
UE - Graphics Features - Oct 10, 20191.glsl_type with image was not fully inited with HlslName field set, causing the crash 2.seems many types of op are not support by current hlslcc, cause error msg. e.g. RWTexture2D.Load[Image Remo ...
AI Perception Peripheral Vision Angle Degrees Being Doubled
UE - AI - Jun 7, 2016Any value that is set for Peripheral Vision Angle Degrees in an AI Perception component's Sight config is doubled. This does not occur with the PawnSensing component, which is inconsistent behavio ...