FrankT, Your odd texture problem is happening because when solid growth trees are lenthened the polygons are actually being stretched, therefore the texture maps pixels are also being stretched. The odd texture problem you are seeing is pixelation from the texture map being stretched as a result of the polygons being stretched. Using solid growth trees in ecosystems will create this problem unless you retexture the tree after you get the size you want. Another option is to use static trees. They scale proportionally, so this problem isn't as noticeable. It sounds like you fixed the problem with a good texture map though. Hope this has helped. : )