Progression

Normal Maps

Seamless Texture

At 25% repeating.

Boxes

Environment Break-down

Red = Modular 

Blue = Unique 

Green = Alpha Cards 

Yellow = Texture 

Sci-Fi Environments created by Sebastian Schulz

Yemen Temple created by Eytan Zana

Image found on http://sketchingastory.com/2011/06/16/from-london-to-toledo/