Kria Engine
The Kria Game Engine is a cross platform 3D renderer and game engine which currently works on Windows, MacOSX and Linux. Currently being adapted for PS2 and PSP, both which use RedHat linux as a development platform. The Kria Game Engine already supports Linux.

Technology
The Kria engine takes advantage of today’s latest rendering hardware:

Dynamic stencil buffered shadow volumes supporting fully dynamic, moving light sources casting accurate shadows on all objects in the scene.

Dynamic characters casting dynamic soft shadows on the scene using shadow buffers. Shadow buffer filtering takes samples on a jittered disc that are rotated per-pixel to detect shadow penumbras. Dynamic branching is then used to refine shadow coverage in penumbra regions.

Ultra high quality and high performance pre-computed shadow masks allow offline processing of static light interactions, while retaining fully dynamic specular lighting and reflections.

Directional Light Mapping enables the static shadowing and diffuse normal-mapped lighting of an unlimited number of lights to be precomputed and stored into a single set of texture maps, enabling very large light counts in high-performance scenes.

Realistic water surfaces
Dynamic Lights
Bump mapping
Parallax mappings
Sphere mappings

All of the supported shadow techniques are visually compatible and may be mixed freely at the artist's discretion, and may be combined with colored attenuation functions enabling properly shadowed directional, spotlight, and projector lighting effects.