Unreal Engine Issues

Crashing when toggling maps containing Color Correct Regions

When maps with Color Correct Regions are streamed into another map have their visibility toggled during runtime, it will cause a memory access violation and crash the editor. ...

FColorSpaceTransform Crash on Linux due to misalignment

FLinearColor FColorSpaceTransform::Apply(const FLinearColor& Color) crashes while attempting to VectorLoadAligned() when running the UnrealEditor on Ubuntu 22.04. ...

Luminance coefficients used throughout the engine not matching sRGB standard

This is causing confusion when working with color in UE5, specifically when validating for HDR between different reference materials. It has also been noted that the color primaries in PAL and NTSC ...

Missing BP/Python functionality to set a viewport OCIO configuration.

Multiple vendor's asked if there could be a way to programmatically set the created OCIO config for a viewport and select the source/dest settings as well and enable/disable the config.  The curren ...

OCIO: orthographic viewport perspectives disable color transform

Switching through a non-perspective view disables the OCIO color transformation until perspective is re-selected. (There is also a related Slate-Editor issue where the visible viewport label doesn't ...

ACEScg Working Color Space renders more saturated than previous versions

Regression: Tested in UE5/Release-5.0, this issue does not occur so this is a regression. This appears to be effecting all Working Color Spaces as well. Each Working Color Space chosen renders the ...

Accessibility option "SetColorVisionDeficiency" blueprint node does not apply to packaged game scene

Changing Frame Buffer Pixel Format to Float RGBA makes the editor color look greyed out.

Changing Frame Buffer Pixel Format to Float RGBA makes the editor color greyed out with a faded look. This is not a regression it is occurring in 4.27. ...

Images Rendered by Movie Render Queue don't match the looking in viewport if After Tonemapping PP was applied

This might be a bug or by design which needs to be handle by certain pipeline (OCIO?), but it's quite confuse that such big difference compare the images rendered by MRQ to those seen in Editor view ...

Images Rendered out by Movie Render Queue has much more visible Banding issue in gradient

I did some experiment locally. At very first I thought it's the image compression issue, since the issue is also obvious while rendered out images as JPG and PNG, there's no image compression qualit ...