message: Wasn't handling OBJ principled material thin import correctly.
diff: @@ -208,11 +208,11 @@ namespace ospray {
  } else {
  rkcommon::utility::Any paramValue;
  parseParameterString(paramValueStr, paramType, paramValue);
  - // Principled::thin is the only 'bool' material parameter
  - // but, needs to be treated with a "bool" paramType
  + // Principled::thin is the only non-float material parameter and
  + // needs to be converted to a "bool" paramType, imported as a float
  if (paramName == "thin") {
  paramType = "bool";
  - paramValue = paramValue == 0 ? false : true;
  + paramValue = (paramValue.get<float>() == 0.f) ? false : true;
  } else if ((paramName.find("Color") != std::string::npos
  || paramName.find("color") != std::string::npos)
  && paramType == "vec3f") {
  