The Island Oasis package is a premium asset collection featuring all of the typical island assorted models, textures and particle effects one can imagine.
Every image and texture included in the package is set a standard resolution of 2048px or higher for maximum quality. Coupled with an example scene and premium prefabs to help make the process of creating your next island scene a breeze.
Please note that this package also requires the install of the "Effects" & "Cameras" portion of the Unity Standard Asset package.
Support Page: http://forum.unity3d.com/threads/3d-focus-support-page.411456/