Every railroad needs a mountain. There is no railroad on earth that runs on comletely flat 100% level ground. Even the great plains have hills. Your going to have to learn to model these sooner or later. Face it. Over the years techniques used to build these mountains have drasticly changed. Probably the most common of the older techniques is the board-wire techniqu. Just as the titile suggests you will need boards and some wire for this techniquqe. The board-wire techniqe involves making cross section templateds for the mountain, connecting them with each other, and covering them with wire screen and then plaster soaked paper towels. A CAD program can be helpful to desighn the mountain and can even print out full size templates to tracer onto the wood. However sturdy this techniqe is it cannon compete with the modern plaster cloth-newspaper techniqe. Once again you should be able to figure out what you need for this techniqe. Take the newspaper and fold it into wads. Place the newspaper wads around your layout to form mountains hills or rises. Cover these shapes with wet plaster cloth as product made by several companies. Plaster brap is a durable cloth that contains plaster dust and drys into a hard shell. It is sold under several names including woodland scenics plaster cloth and rigid wrap. These products have occassionally been replaced with paper mache by poor people like me who don't have the money to buy fancy shmancy landscape stuff all the time. Nowdays I barely buy anything. Although there are many other methods of building terrain contours these are the most prevelant. Have fun.