outMtl << "# Material Count: " << (const Unsigned)materials.size() << "\n\n";
for(std::set<std::string>::const_iterator it(materials.begin()); it != materials.end(); ++it)
{
outMtl << "# Material Count: " << (const Unsigned)materials.size() << "\n\n";
for(std::set<std::string>::const_iterator it(materials.begin()); it != materials.end(); ++it)
{