I use Terragen for a lot of things I do. Why doesn't Gaea have the option of exporting .ter files. I have to export the terrian as a tiff file which appears to leave some artifact.
I think Terragen .ter file format support would be great. Also If more formats make it into Gaea I would also like to see .hfz which is a high precision compressed format L3DT uses/developed. World Machine also supports .ter and .hfz. http://www.bundysoft.com/docs/doku.php?id=l3dt:formats:specs:hf2 http://www.bundysoft.com/docs/doku.php?id=libhfz