I made this in blender mostly as an experiment to see if I was capable of making assets that would run in real-time, this example is with the highest resolution textures I rendered out, so you might want to rescale them if you plan on using this. The planes with the grass texture off to the side are the objects you would use to populate a landscape (eg. some sort of particle system in a game engine) Also, this example has a much higher density than would be usable in-game so it isn't very optimised. Anyways, its free and I don't really care what you do with it, as long as you give me a little credit ;)