Terragen for Mac

From Planetside:

Terragen 2 is a powerful solution for rendering and animating realistic natural environments. Create entire worlds from your imagination, or import real world terrain datasets and use Terragen 2 to create the most realistic visualisations possible. You control the weather, landscape, rivers, lakes and oceans, suns, moons and stars. With Terragen 2 you have complete control over the shader networks used for terrains, textures, micropolyon displacements, clouds and object distributions. You can reorganise the planetary shading pipeline to suit your goals. Place grass and trees wherever you want, as well as other objects in OBJ format that you can model in third party software. It's easy to find great plants and objects modelled by other Terragen users or elsewhere on the web.

Terragen is not a game engine; it has a sophisticated film- and broadcast-quality renderer and procedural modelling tools designed so that you can create the most realistic images possible without taking a photograph. Nor is it a general-purpose 3D program designed to render everything. We have dedicated more than a decade to specialising in algorithms that simulate skies, outdoor lighting, terrain textures, and to render extremely large and detailed terrains. Terragen 2 puts those algorithms in your control. When you need CG environments that don't look CG, Terragen 2 will help you get there. If you want to go beyond reality, Terragen 2 is a toolbox with infinite possibilities.