Colin, do you know how a Global Scenery is generated? I mean, especially keeping in mind how big our planet is, how diverse it is, and how complex it would be to cater for every possible local specialty? The thing is, that we need to have ways to create it all in "automated" ways (without too much manual intervention), where we have to rely on existing (or usually improved / processed) data sources and complex algorithms to translate it in a - here comes the word Ben highlighted - plausible world. Everything else is NOT possible / feasible when you need to take care of an entire planet. BUT of course this doesn't stops anyone to create his own, regional sceneries, where he can take care of every tiny detail he wants to (the X-Plane engine and scenery system is open enough to give you almost every possibility you might dream of - but its of course a lot work, which doesn't comes via magic) Now for the trees / forests ... Their type is not decided by biogeographic zones (which we have quite a lot on our planet ... especially if one takes a regionalized and not generic approach). That would be too diverse, if one wanted to do it in a perfect way .... For example take the WWF Global 200 ecoregion classification ... yes, it divides out planet in 200 different ecoregions: http://en.wikipedia.org/wiki/Global_200 This would mean, we would need to handcraft for each of those regions an own set of different forest (sparse and dense versions of deciduous, mixed and coniferous forests etc. ) ... and try to make enough (different) textures of all possible trees there. Definitely not an easy task (I know, because I deed the XP8/9 forest sceneries and had help from a good friend with crafting all the textures and forests .... some info about that is still on my site: http://www.alpilotx.net/downloads/old-forest-downloads/ and http://www.alpilotx.net/documents/ ) ... so, thats why we go the plausible approach, and "only" work with climate zones for the forests (and for the ground textures too). These are derived from high res - real - climate data and are usually a combination of temperature and precipitation zones. This is then also the reason why you might see the same forests on Hawaii and Oregon ... obviously you have similar climates in the given location OR that texture was used in more than one of the climate sets (it might be understandable, that we did not - until now at least - try to reproduce thousands of different tree species )