XeFG and XeLL not supported with Engine version: 4.27.2, please check any Engine source patch available and applied

[Flaczki901]

Previously has been fixed the issue with XeSS 3.2.0 Version and the standard XeSS upscaler now works but i’ve encountered problems with XeLL and XeSS-FG, even though they are supported according to the XeLL and XeSS-FG test specifications:

GPU: Intel Arc B580
GPU VERSION: Intel Arc Graphics 32.0.101.8991

a screenshot of the message in Unreal Engine 4.27.2:

Simply used r.XeFG.Enabled = ‘1’ and r.XeLL.Enabled = ‘1’ but it always returns:

[2026.09.01-16.14.24:225][512]LogXeSSCommonCoreModuleBase: Warning: XeLL not supported with Engine version: 4.27.2, please check any Engine source patch available and applied
[2026.09.01-16.14.24:225][512]r.XeLL.Enabled = "1"
[2026.09.01-16.13.06:233][ 50]LogXeSSCommonCoreModuleBase: Warning: XeFG not supported with Engine version: 4.27.2, please check any Engine source patch available and applied
[2026.09.01-16.13.06:233][ 50]r.XeFG.Enabled = "1"

is there a problem with the detector or something?, it require a patch for the source code do you have that patch to add?

[xessgamedev]

Yes, Unreal source and a source patch is required to make XeSS-FG and XeLL to work with 4.27.
Since we could not share the source patch publicly, you need to contact an Intel account manager to get the source path with your company and project information.

[xessgamedev]

Here are some details: https://github.com/GameTechDev/XeSSUnrealPlugin#ue-versions-supported

[Flaczki901]

Thank you for the information, I’ll get in touch