Luoshuang's GPULightmass

hi @Olegsbr ,
After a long investigation to a similar problem with GPU settings.
In effect 4096 x 4096 texture will work, but 4000 x 4000 will cause GPU crashes .
In the Nvidia Cuda code that is LGPU this is taken into accoun and spits out invalid Argument.

The is because the values are not Power of 2. Epic have spent a LOT OF EFFORT in creating a tool in Unreal Engine 5.5 Fortnite called Confrom Texture.
This tools effectively changes the texture to the nearest power of 2

Textures can be checked with a Windows Calculator take 4096 find square root and the decimal point is 0 namely an integer. Take 4000 square root and it got a long remainder after the decimal which is detected in Cuda and spits invalid argument namely the texture is a float not an integer

This causes the GPU to have patterns stored that cannot be over written, hence the need to restart the PC or reset from Nvidia Control panel.

If you want a more detailed log look at the Swarm log as LGPU is running and it will spit out a source code line number, basically this can be seen as an assertion code protecting the LGPU code
The Swarm Cache needs deleting

see Fortnite
Document Resizing Textures contains error 512 is not a Power Of 2 - General / Issues and Bug Reporting - Epic Developer Community Forums

Power Of 2 Does not work - Well it does