This scenery replaces the forests of XP11 with forests, orchards, vineyards, tree lines and trees derived from OSM data. For the objects, original forests and trees of XP11 are used, so there is no additional library necessary.
Best for use of photo sceneries, but even with standard scenery this could be a win, try out and see. Original forests of XP11 are excluded for all covered tiles, but autogen trees in cities still remain visible.
No additional library needed, should be compatible with XP10 too.
Download at http://simheaven.com/?page_id=14813
Screenshots of the Rhine Valley, the Alps and Innsbruck: