1. I also have a new laptop, but it doesn't depend on how new it is... I've seen it on many maps.
2. Then that's not it.
3. Textures are, in simple terms, drawn skins and graphics. The more elaborate the texture, the more polygons are used, the more difficult and demanding it is to animate and render.
3. The thing is, there aren't any particularly elaborate textures right now, and the animations work great. The only thing that bothers me is that the water is displayed very poorly, with dark stripes appearing all the time, and of course, the "skirts" of the creatures slow things down terribly, which makes the game quite uncomfortable to play.