Hi Aaron,
I've been experimenting with a Mud Box and Maya workflow that incorporates L3DT, and one of my biggest bottlenecks is getting an accurate representation of the height field into either Mud Box or Maya.
The issue is that both software packages have a known "stepping" issue with 16 bit file formats, and recommend using 32-bit formats such as open .exr to achieve smooth displacement when rendering (with Mental Ray).
So far, I've gotten around it with this test terrain. I exported the heightfield from L3DT in a RAW 16 format (because my height range was 1m to 513m, and the map res was 1m/px, nothing lost).
Then I used Photoshop to open the RAW 16 file (photoshop can't open the RAW32 files that L3DT exports). I then converted this into RGB 32-bit mode, and saved it out into an *.exr file.
I was then able to get it into MudBox as an image-displacement (in order to generate a low poly version of the terrain, and bake the high-poly details into a displacement map). I export the low-poly terrain and the detail map, import into Maya and render with Mental Ray.
Would you be able to add an export function for *.exr? I'm not sure what other format would be best......