URL model=HelloChess.class.getClassLoader().getResource( //"data/board/chess.3ds"); "data/pieces/Bishop_White.model"); //"jmetest/data/model/maggie.obj"); // Create something to convert .obj format to .jme FormatConverter converter=new ObjToJme(); // Point the converter to where it will find the .mtl file from converter.setProperty("mtllib",model); // This byte array will hold my .jme file ByteArrayOutputStream BO=new ByteArrayOutputStream(); try { // Use the format converter to convert .obj to .jme converter.convert(model.openStream(), BO);