Not directly that I know of, as from what I know, the materials are listed in the SMD in the order of the first triangle to use them. This means you can possibly indirectly change it by duplicating the arm mesh and then remove the original arm mesh, but again, you can't directly set it, so it can't be relied on too much.

However, you can easily do something like -- in the QC file (at some point before loading a(n) SMD/DMX with the materials) to add a "Weapon.vmt" material and then an "Arm.vmt" material (without necessarily adding multiple skins to the model in $TextureGroup), so the "Weapon.vmt" material is embedded into the model before the "Arm.vmt" material. This has worked in the case of someone wanting to layer copies of a mesh over itself in a specific order for a Source FilmMaker model.

引用自 Zappy：

Not directly that I know of, as from what I know, the materials are listed in the SMD in the order of the first triangle to use them. This means you can possibly indirectly change it by duplicating the arm mesh and then remove the original arm mesh, but again, you can't directly set it, so it can't be relied on too much.

However, you can easily do something like -

$TextureGroup Skins { Weapon Arms }

- in the QC file (at some point before loading a(n) SMD/DMX with the materials) to add a "Weapon.vmt" material and then an "Arm.vmt" material (without necessarily adding multiple skins to the model in $TextureGroup), so the "Weapon.vmt" material is embedded into the model before the "Arm.vmt" material. This has worked in the case of someone wanting to layer copies of a mesh over itself in a specific order for a Source FilmMaker model.

Thanks, the $Texturegroup trick worked.