Ben Supnik, lead developer with Laminar Research would like to share with you the following issue …. Extended DSFs in X-Plane 10.40.
X-Plane 10.40 will have an option to load a larger local region of DSF scenery. For as long as I have been involved in X-Plane (back to X-Plane 6 as a user) the local scenery region was 3×2 tiles (each 1×1 degree in latitude and longitude). With this option, the region is 4×3.
What this gets us is the option for a longer viewing distance before we have to transition from the higher detail DSF scenery tiles to the lower resolution whole-planet render. In X-plane 10 the planet render actually has shape, but the resolution is low; if you see it up close, it does not look good.
Some fine print:
You will only be able to use this option in the 64-bit build of X-Plane. The 32-bit version does not have enough memory. Combining extended DSFs with heavy third party scenery may be unacceptably slow. For example, Alpilotx was able to run extended DSFs with the HD meshes, but his computer has monstrous amounts of RAM (64 GB I think??). I’m pretty sure extending with the UHD meshes is a non-starter. Load time shouldn’t be too bad; this change also includes a re-work of the DSF loader that takes better advantage of multi-core hardware. If you have a 4-core machine your DSF load time shouldn’t be worse, even with extended DSFs.
Want to read Ben’s complete article … check it out at his dedicated blog.