Help with animated heightmap

[Voltage]

I'm trying to work out algorithm to create 16 frames of a heightmap... in this case the heightmap represents the surface of some water.  My proggy will loop through and render each of these frames one after the other, and then loop back and start at the first frame again.

I also need these frames to be tileable / seamless.

I've had a few attempts at it but everytime I get an interesting animated water like effect... the frames don't stay tileable.

Any ideas on an algo to solve this problem?

[hellfire]

The easiest way to make a simulation tileable is to simply copy each "particle" beyond each border.
So when a particle leaves your tileable grid at the top it also comes back in at the bottom (and vice versa), same for left and right.

But if you like to share some more details about your algorithm, there might be more appropriate solutions...

[Voltage]

Thanks for the tips Hellfire.

This is for a demo I writing that will be shown in very soon.  I have run out time to get too fancy with this.

Maybe I'll revisit this.