It's very tough modding alone. That's the reason I've abandoned so many maps. I don't know if you're good at shaders, but parallax mapping could give a nice look for grass. It uses the GPU, so it would save on the CPU. I think a graphic overall should be done with shaders. I can't imagine redoing all the textures.
Edit: I don't know if this would be helpful, but it looks good with stone.
It's very tough modding alone. That's the reason I've abandoned so many maps. I don't know if you're good at shaders, but parallax mapping could give a nice look for grass. It uses the GPU, so it would save on the CPU. I think a graphic overall should be done with shaders. I can't imagine redoing all the textures.
Edit: I don't know if this would be helpful, but it looks good with stone.
http://graphics.cs.brown.edu/games/SteepParallax/
pretty good explanation here:
http://www.gamedev.net/page/resources/_/technical/graphics-programming-and-theory/a-closer-look-at-parallax-occlusion-mapping-r3262
Here is a video of what I was thinking could be done by parallaxing the grass:
https://www.youtube.com/watch?v=7OVNG9a5bnk