Some window settings will not work if configured inside the openspace.cfg file rather than in a .json window configuration file. This includes fullscreen, border, and others.

Some background:
SGCT uses a .json file to define all possible window settings. A .json file in the config/ directory can be used, or manually edited in a custom configuration. Another option is to use the window config GUI from the launcher, which creates a .json file in user/config/.

There are two ways to specify settings inside openspace.cfg. The first is to simply reference an existing .json file. Another way is to call the sgct.config.single or sgct.config.fisheye functions which reside in scripts/configuration_helper.lua. Arguments can be passed to the function, which will then generate a .json file in the filesystem /tmp directory. The issue is that some of these arguments are incorrectly ignored.

The problem is likely in the function generateWindow, where arguments such as border and fullscreen are handled.