Plutonium

Xemphas just in case you don't know, if you host a server you can apply camos to default classes in the dsr file or weapons you give with gsc script.

Also if you want to use a custom camo you don't need a camo made for the Intervention, any camo would work https://forum.plutonium.pw/category/27/mw3-modding-releases-resources

Try to install the DLCs for IW5, the creator of that map probably assumed everyone has the DLCs installed or tried to slim it down by not including textures that are part of the DLCs.