For those of you who see a black square when you activate your scope:
You need to open your UnrealTournament.ini located in your UnrealTournament\System folder and find the settings for your renderer, like:
[D3DDrv.D3DRenderDevice] if you use Direct3D
[OpenGLDrv.OpenGLRenderDevice] if you use OpenGL
[D3D8Drv.D3D8RenderDevice] if you use Direct3D8
Here make sure that HighDetailActors=TRUE
Once that setting is set to "TRUE" save and close your .INI file and your reticle problem should be fixed.
https://ut99.org/viewtopic.php?f=12&t=976&p=10844&hilit=black+box#p10844hope this helps