The same Windows functionality as scaling user interface elements,
confuses fullscreen games unless they set a particular of metadata to
indicate that they perform the scaling by themselves.
What happened was treating 2160p as 1440p despite the former being
chosen. The same occured with other game title prior to introducing the
metadata bits.
Fortunately with CMake there's no need to invoke the mt.exe "manifest
tool" manually.
Note that the setting of "per-monitor DPI aware" still leaves openmw
confused, hence the choice of global-DPI-aware.
Stanislaw Halik