Tidhar Raz

Hi I am trying to draw a terrain from an height elevation file (DTED,DEM...) I take the height data from a file and create a height bitmap. The problem I have is when it is displayed I see steps in the terrain. Here is a link to the images: https://imgur.com/a/CqFQw How do I make the terrain with out steps and make it appear as moutains ? Thanks Allot Raz