From TDN

This page is a Work In Progress.

Follow this guide to help you create a Tropical look, please make sure you have read the Research page.

Tropical look

WorldEditor Tweaks
You will need to tweak the sun, the sky, the water and other datablocks to give your level the correct visual style.

Assets
Building your models for a Tropical style visuals does not requires changes in your pipeline, but more directly a drive towards specific shapes and models that give life to this style.