Quote from 2DNED on February 20, 2022, 9:18 am

Load screens are simply .TGA images 800 X 600 in size.

There are 5 of them.

loading.tga - This is the first image you see as it loads the game.

loadscrn.tga - This is the default screen seen when loading a mission

However a .PCX Image with the same name as the mission can be used to overwrite this image,

and is commonly done as a Mission Briefing.

Mnurelod.tga - This is the image used when reloading menus.

JO_epil.tga - This screen is used when loading the menus after you win a mission.

JO_epil2.tga - This screen is used when loading the menus after you lose a mission