Hi. I found Unigine engine Evaluation Kit. It was very interesting. possibly, it will be interesting for you in future JMP development.
http://unigine.com/products/unigine/features/#tools
I found very interesting:
- image dds converter
- normal/parallax/occlusion map baker
- terrain editor
Have a try to play with terrain editor. I think it’s very interesting…
http://www.mediafire.com/?w6ns5lnw6sbmgnc - binaries for linux/windows. Only for evaluation and non commercial use.