Delta3D has been known to work with CAVE-systems. Also, it is known to work in a cluster environment.
Overview
Delta3D is an open source game engine which has been widely used by many different projects and is well-supported by a vast community. Delta3D bundles together many well-known open source projects and offers an easy to use API to access them.
Skeletal Animation
It supports Skeletal Animation, but the process from 3D Studio Max to Delta3D is a bit complicated and involves Cal3D. In short, you have to export the character in four different parts:
- Skeleton
- Material
- Mesh
- Animation
Interoperability
Delta3D can run on a variety of different operating systems:
- Windows (XP)
- Linux
- Mac OS X
As E-ON Studio runs on Microsoft Windows, it is important that the open source solution that we select also can run on this platform and co-exist peacefully.
3D Studio Max terrain
Source: http://www.delta3d.org/article.php?story=20051115140557167Delta3D can import Static Mesh Terrain via the Delta3D World Builder. It takes a .3ds file as an input and converts it to a Delta3D-useable format.
Community
Delta3D seems to have a large and active community which will help the open source project in many ways. Furthermore, it can be beneficial to our goal in bringing Skeletal Animation to LTH:s VR-lab.
An active community can provide help and feed-back along the way of implementing the system.
Speed
Delta3D uses Open SceneGraph as to draw its scene, and is considered to be “high performance”

[...] Delta3D [...]
[...] 23, 2009 by sentriel Open SceneGraph (OSG) is the scene graph used in Delta3D. It is a widely used open source scene graph that provides an object oriented framework on top of [...]
Hi,
Just wanted to give you an update regarding Delta3D and performance.
Recent work was performed to ensure that Delta3D supports all of the multi-threading modes defined in OpenSceneGraph. Also the hardware skinning code was modified so that animated characters are renderable in multiple windows.
What this means is you can now render a multitude of animated characters, in multiple windows (e.g., a CAVE), and take advantage of your PC’s multiple cores.
Keep up the good engine comparisons!
-Erik Johnson
Delta3D, Lead Engineer