That would be some tough re-texturing if those aren't standard materials. There's some nice elements in there to composite with. Bit of motion blur, some atmospherics. I quite like the landscape.
I've been playing around with Fusion recently, it's free! Not bad for a proper node based compositing package. It will take in all the render passes TG can create including z-depth. So if you wanted to grab the camera in Lightwave into TG for some atmospheric passes, you'll be able to get Prometheus to emerge from volumetrics.