Co sa tyka svetiel je to vec vyvoja. Pristavacie ma lepsie ako FSX 
Tieto fotky tiez nie su moc svetle http://profipilot.sk/fotografia/158
Vec detailnosti nie je vecou x-plane da sa ist do najmensich detailov, ide o to ci je to nutne.
The maximum single texture size in X-Plane 8 is 1024x1024, and in X-Plane 9 it is 2048x2048.
I believe the maximum number of unique custom orthophotos that can be attached to a single DSF is at least 32768.
In practice, that number is pretty useless because X-Plane loads all textures for a DSF at the highest user-allowed res when the DSF is loaded. That means you tend to load a lot of textures. Every system is different and drivers have a lot to do with RAM efficiency, but generally you'll run out of virtual address space and crash the sim before you can attach 32768x2048x2048 of pixels.
X-Plane has no limits on how the texturing is applied - that is, you can use your 2028x2048 texture to cover an entire tile or a single meter. So again, the limiting factor on the resolution of your orthophotos is how much total area you want to cover and how much RAM you can spend (remember RAM is also used for mesh complexity, 3-d models, etc.).
You do not need to have enough VRAM to hold all loaded orthophotos; the video driver will paeg the textures into VRAM. Virtual address space is the limiting factor. How far you push it depends on a lot of subjective things:
If you expect your users to also run with a lot of trees, 3-d objects, cars on roads, and some plugins, you can't use a lot of RAM.
If you expect your users to have /3GB in their boot.ini and use nothing but your add-on, you can use a lot more RAM.
Generally the size of the DDS texture on disk is a good proxy for the virtual memory that is required to hold your textures.
It should be noted that these limits on texturing (due to X-Plane blindly loading a lot of stuff at once) affect all scenery types: objects, draped polygons, very complex airplanes, plugins, and not just terrain mesh orthophotos.
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