This is an old scene that I have recently rediscovered and revived. The original components, the gun and its platform, were modeled entirely from Bryce primitives.
I recently rediscovered the unfinished scene and decided to improve it by adding some figures to it. The figures were posed in Daz Studio and imported to the scene. I also added three small spaceships, which were modeled in Carrara and then imported into Bryce.