A small island with an abandoned, overgrown, city I put together using WorldMachine and ClarisseIFX.
Always wanted to do some scene like this.
Also used a lot of free assets for the trees and clouds.
final scene is around 125B polys(all that green is actual blades of grass... dont ask why).
Overall this was around a 4 hr render at 8k square res. Volumes were killing the render time... Still need to learn some optimization tricks.