When loading Quake 4 in Ultra settings there is a bug where all the textures will be low quality. To fix this issue we need to create a config file to place in the Quake 4 game directory
- Browse to QUake 4 game directory
Steam > Right-click on Quake 4 > Properties... > Installed Files > Browse...
- Go to the
q4base
directory. - Create a new file called
autoexec.cfg
- Copy the below config into the file and save.
seta image_downSizeLimit "2048"