Your basic tutorial says to use a 256x256 HF to make basic FPS stuff.
It seemed the lighting map was very aliasing using 256x256 to render into the 2048x2048 light map. (I resized the HF afterwards so I could get a higher resolution Light Map / Texture Map).
It seems that resizing the map didn't fix the problems of aliasing. Maybe the HF didnt interpolate on resize? I'm not really sure. I was working with a 2048x2048 HF at first but it seemed like it produced too much noise because of how much perlin noise I used. (You cant tell how bumpy the terrain is because its width/height in verts is not 2048x2048 (or so it seems its not).
Maybe I should just blur the HF in photoshop to reduce the noise afterwards? I'm not sure if this is a normal problem or maybe I should have just used the "noisy normal map" and finished everything to see the final result on a terrain.