Seamless heightmaps? I don't know why you'd want such a thing, other than for some kind of texture creation program.
Doing that is trivial though.
All you need to do is when the noisemap is generated each pass, copy the pixels in the left colum to the right column, and copy the pixels in the top row to the bottom row.
That's all you need to do to make it seamless.
Doing that is trivial though.
All you need to do is when the noisemap is generated each pass, copy the pixels in the left colum to the right column, and copy the pixels in the top row to the bottom row.
That's all you need to do to make it seamless.