Marsz Gustov Crater vulcano. This is for decorating your scenery, they have 1km approximately, of course the real one in Mars have hundreds of kilometers. They have made by taking an (megt, img ) Mars mola dem satelite image in the program 3dm Visualization then exported in dem format and imported in 3dMax whit the dem plugin and resized and converted.
TRAINZ MARSZ TERRAFORMATION COLONIE 2012