For my game I am trying to create a Minecraft style world that is based off a heightmap that I made In Photoshop. I am trying to make the map which is 7km squared where each cube is 1m cubed but I haven't found a way to do it. The heightmap converts to a terrain file(in unity), but my problem is that I can't create the Minecraft look.
While being down voted I will tell you a professional approach to a Minecraft style terrain using heightmaps. So you should of learned by now that your heightmap should be grayscale. black = lowest point, white = highest, and the gradient in between controls height in between. there are 255 possible color combos if you include black and white. from there, each pixel is = to 1m in game.
7km*7km = 7000m*7000m = an image that is 7000*7000 pixels. Programming the flat surfaces in the game is a different matter. You need to program the terrain generator (or a class that talks to the terrain generator class) to take each pixel by location, then create a flat cube like surface. for instance every 10 units in game are = to 1m. this means that the generator will generate 10x10 units in game at height A, then the next one over at B.