They are part of Lambomods Military mods: 5/1/2024 UPDATED. The white walls are supposed to have textures but you need to be a patron to get them. (you do not have to be a patron to use... they're just missing textures) However he puts out some amazing mods and many have the textures. Link here: When on page CLICK show more to get download
https://www.patreon.com/collection/453058?view=expanded
