Terragen 4 is out

Terragen is a solution for building, rendering, and animating realistic natural environments. Create entire worlds from your imagination, or import real world terrain data sets and use Terragen to create the most realistic visualizations possible. New features in version 4:

Ray-Traced Preview

• The new Ray-Traced Preview (RTP) provides almost instant feedback as you work on your objects, shaders, atmosphere and lighting, allowing you to fine-tune your scenes much more quickly and easily.

Multiple Scattering in Clouds

• Terragen 4 can simulate light scattering hundreds of times within clouds to produce their characteristic softness, as well as inter-cloud and cloud-surface interactions. Along with new presets that realize a variety of common cloud types such as altocumulus, the new cloud shading technology allows you to produce highly realistic skies.

Ozone

• Simulation of the absorption of light by ozone in the atmosphere, making the already realistic atmosphere model practically indistinguishable from reality.

Other features:

• Lens effects
• Faster rendering

More info and download : Terragen website.

What is Terragen?

You control the weather, landscape, rivers, lakes and oceans, suns, moons and stars. With Terragen you have complete control over the shader networks used for terrains, textures, micropolygon displacements, clouds and object distributions. You can reorganize the planetary shading pipeline to suit your goals. Place grass and trees wherever you want, as well as other objects in native TGO or OBJ format that you have modeled in third party software.

Multiple Scattering in Clouds