I'd like to see more tools for the height map, such as colour customisation similar to the design map
As I make height maps for programs doesn't really support underwater (or in fact, which doesn't support customisation of water and the landscape and in fact, the texture as well), It would be nice to have features which could tell you which parts of the height map would or wouldn't be underwater instead of the pure black and grey so that I could have a certain amount of degree that what would be produced would suit my needs.