Will this mentioned feature: "some sand will eventually dust up" be possible with the 3D background? This means every little piece of the sand or gravel must be a real 3D object. This would also be a prerequisite for the "fish eats sand and spits out" - feature. Would be great, and nothing is impossible (especially for Jim) but that sounds a bit too much work.
It could either be a particle system or multiple cloud sprites at slightly different depths.
