This theme is optimized for 3456x2160 screen resolution
To make sure that everything is ok, I recommend you to set the certain resolution into /etc/default/grub
Like this:
GRUB_GFXMODE=3456x2160
On my notebook it looks like this:
Photo was taken from Unsplash and made by Mathew MacQuarrie (this message from future, when I updated screenshot)
There are really cool photos
There is also one useful guide on how to make a theme for grub
A lot of thanks to it`s author
And I used grub-mkfont
to get special grub font .pf2
type:
grub-mkfont -s 72 -o dersu_uzala_brush_72.pf2 ./Aesthetics_of_death/Dersu\ Uzala\ brush.ttf
This article describes how to use this tool
Also my respects to author of original Sekiro theme