Adding harvestable resources to a sublevel
This guide will assume you have already created your resource/s and know how to place it/them on the map. If you do not know how to do that, please see this comprehensive guide Creating a Harvestable Resource by "TheWookie"
In TheIslandSubMaps folder, right click anywhere in the grey area & select "Level" under the "Create Basic Asset" section of the pop-up. Name & save it then load "TheIsland".
Open the levels window once "TheIsland" has fully loaded.
Find your sublevel, right click and select load.
You should now have an open eye next your level. Go ahead and add your resources to the spots on the map where you want them to be located.
Once all your resources are placed, Click the little arrow right below "Copy to Selected Level" and set it your sublevel. Save your sublevel, NOT "TheIsland".
Put your sublevel name in the "Maps" (Multiple sublevels must be separated with a comma) section then click "Cook Island Extension". It will automatically cook whatever is in your mod folder
Tutorial written by P0k3r.