from a behind the scenes site on Babylon5:
The B5 effects teams, both at Foundation and at NDI, use Lightwave 3D by NewTek and specialized software to design and render the visual effects. For the pilot, the effects were rendered on a network of Amiga computers; later, Foundation used 12 Pentium PCs and 5 DEC Alpha workstations for 3D rendering and design, and 3 Macintoshes for piecing together on-set computer displays.