TE was released for XP 11 as summer only, well explained by JV at the time, because four or five seasons of photoreal textures would require terrabytes of storage. This provoked a really interesting debate on how we will need to focus more on storage if we want photoreal seasons, the cost of SSD's. Also how FS platforms might respond with ways of using inbuilt preset shader solutons for seasons as Slipstream & F737NG suggest  - all very exciting and no doubt pointing to a new direction for L