These two were done for my cgma class week 7. 

This is my week 8 assignment for my CGMA class  

Here are some thumbnails I did while taking my CGMA class

Building Thumbnails 

Rock Thumbnails

Land Mass Thumbnails

  

Some lighting studies done for my CGMA class

Some colour studies done for my cgma class. Usury I start in grey scale but these 3 were made by jumping straight into colour.   

Some more sketches done for my cgma class. 

Here are some quick sketches based off a made up island. This was done for my cgma class Fundamentals of environment design with Kalen Chock