The challenges are too numerous to list. Displaying 3D graphics with OpenGL, using the Eclipse framework has some massive learning curves. Today, I can do similar things using PlayCanvas and JavaScript using existing libraries. This application is standalone and not connected to the web. Had to figure out how to import USGS geographical data into a Java application. Some of the demos show how to simulate paper folding using GLSL shader code. This application also uses chess engines to calculate best moves in chess games. Chess GUI interface included.