I have released two new products fully designed to work with Terragen 4 (tested with Terragen 4 beta) and so not compatible with Terragen 3 :
Clouds Layer 3 is a “above clouds” preset using new Terragen 4 clouds. It is delivered with a test scene to make following renders.
Imaginary World is a variation of this preset adapted to sunset picture over clouds. It is delivered as a complete scene with clouds, terrain and surfaces.
You can use these preset and scene in all your commercial or non commercial projects.