message: The importer basename should include extension.
  including the extension prevents collision with similar
  names.  ie. model.obj and model.gltf.  Rare, but can happen.
diff: @@ -141,7 +141,7 @@ extern OSPSG_INTERFACE std::map<std::string, std::string> importerMap;
  inline std::shared_ptr<Importer> getImporter(
  NodePtr root, rkcommon::FileName fileName)
  {
  - std::string baseName = fileName.name();
  + std::string baseName = fileName.base();
  auto fnd = importerMap.find(rkcommon::utility::lowerCase(fileName.ext()));
  if (fnd == importerMap.end()) {
  std::cout << "No importer for " << fileName << std::endl;
  