The base color of a material in unlit mode changes when specular amount is above 0.0

UE - Graphics Features - Feb 24, 2020

Material's RGB base color values are changed in Unlit mode when specular is greater than 0.  User repro video:  [Link Removed] Tested in: 4.23.1 CL#9631420, 4.25 CL#11574810 ...

Android streaming audio repeats at start if start time is 0.0

UE - Platform - Mobile - Nov 18, 2015

An audio file needing decoding (streaming) will repeat at the beginning of play if the start time is 0.0. ...

Setting the Falloff Distance of a Sound Wave/Cue to 0.0 will no longer Play Sound

UE - Audio - Jan 13, 2016

As the title suggests, whenever you add a Sound Cue or Wave to a level and set it's 'Falloff Distance' to 0.0 the sound will no long play. I have attached a project to provide a simple regression t ...

Crash during shader compilation when r.Shaders.Optimize=0

UE - Rendering Architecture - Shaders - Mar 11, 2024

The primary shader crashing is "FVisualizeLumenSceneCS" which I've put in the callstack section, but I think this is more likely a binding problem as I'm also see the following crash with cloud shad ...

UV Import layout error increases with movement of UVs away from 0-1 Space

Tools - May 27, 2015

When a user sets up an unwrap using a space outside the original 0 to 1 space the unwrap will increasingly show errors of positioning. For Example, in the following images the lower left vertex of ...

r.Shaders.Optimize=0 crashes when compiling a UI material

UE - Rendering Architecture - Materials - Sep 2, 2024

[2024.08.30-22.12.22:384][ 73]LogWindows: Error: appError called: Assertion failed: CurrentGPUVirtualAddress != 0 [Link Removed] [Line: 659] Disabling shader optimisation can crash the editor when ...

The light in the Blueprint Editor's Preview Scene does not respond to any lighting channel but 0.

UE - Framework - Blueprint Editor - Jun 28, 2024

In the Blueprint Editor, Primitive Components can be configured to respond to Lighting Channels 0, 1, and/or 2. However, if channel 0 is disabled (even with another one enabled), the Preview Actor's ...

Get Font Size returns 0.0 for default (null) font value

UE - Gameplay - Jan 21, 2015

When using the default value in a "get text size" node, the height and width return 0.0. Note: potentially returning null value as no hard value is presented to font. James: Should use same fall ...

Anisotropy of base disappears when clear coat is greater than 0 when Substrate is enabled

UE - Graphics Features - Substrate - Jun 24, 2024

Anisotropy from the base of a material disappears when clear coat is used. Car paint with base specular_anisotropy at 0.5 and coat at 0.0 [Image Removed] When coat is 0.0: [Image Removed] ...

Preview rendering does not update when slider is moved below 0.0 in timeline on in Niagara Editor.

UE - Niagara - Jul 26, 2023

Workaround in UE5.3:  UNiagaraComponent::TickComponent             if (AgeDiff < 0.0f)             {                 SystemInstanceController->Reset(FNiagaraSystemInstance::EResetMode::ResetAl ...