Terrain: using high resoultion light-maps (that increases reality, terrains shadows supported), up to 4 texture stages, (for example, 20480m x 20480m with detail level 10m). Larger terrains can be made of segments, this reduces memory & processor overhead, fractal terrain generator, real maps import capability as well.

Bump mapping.

Dynamical sky, (that means you can set any time in the environment and it will reflect real properties)

Clouds, up to 4 levels (not polygons).

3D Terrain plants (trees, plants e t.c), fractal generator of trees which can generate large range of tree types (up to 65000 plants per sector).

Water, which includes such effects as: reflection, speculer highlights, transparency.

Cliff & snow texture generator, which optimizes using video memory.

External 3D objects render supports all the properties of materials (bump mapping, reflection, e t.c) real shadow volumes cast at all objects in scene.