TextureChanger.cpp

class mtexinfo_t
{
    char pad[76];
public:
    IMaterial* material;
};

class worldbrushdata_t
{
    char pad[88];
public:
    int numtexinfo;
    mtexinfo_t* texinfo;

    int         numtexdata;
    csurface_t* texdata;
};

void UpdateMapTextures()
{
    static auto NewMaterial = MatSystemOther->FindMaterial("ground\snow01", 0); // Already exists in CS:S.

    for (auto i = 0; i < host_state.worldbrush->numtexinfo; i++)
    {
        host_state->worldbrush->texinfo[i].material->Release();

        host_state->worldbrush->texinfo[i].material = NewMaterial;

        NewMaterial->AddRef();
    }

    Engine->ClientCmd_Unrestricted("mat_reloadallmaterials");
}