added example code for experimental terrain elevation change
added example code for experimental terrain elevation change

nakijun/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,nakijun/vtp,seanisom/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,markraz/vtp