Is there some way to simulate the ecosystem feature of Infinite in Esprit?

Sort of, yes. Check the scatter/replicate  feature. It allows you to spread out objects over a region. If you do is smart it will give you similar results - of course with a lot more memory involved.

One day your ship comes in - but you're at the airport.

http://www.monsoonsky.com/resources/Tutorials/index.htm

 

Here's a tutorial at my under construction website.

It's as valid a technique as actual memory hungry polygons since it's only the final image that really matters. So check it out.

M

ps....it's really lengthy as I covered every single step for beginners.....but I think you'll like it.