New update to Terraman on Highend 3d:
https://www.highend3d.com/maya/script/terraman-for-maya
Adds a proxy mode to enable low resolution proxies in a Maya scene to render high detail terrain at render time.
Used in my animation "Desert Dawn Drive" to generate deep OpenEXR to composite Maya elements with Terragen renders.
Check it out in the Animation forum:
https://planetside.co.uk/forums/index.php/topic,26817.0.html