Function object_set_material 

pub unsafe fn object_set_material(
    object: *mut IObject,
    material_index: u32,
    model: i32,
    texture_library: StringView,
    texture_name: StringView,
    colour: Colour,
)

void IBaseObject::setMaterial(uint32_t, int, StringView, StringView, Colour).

Safety

object must be a live IObject.