Hi Steve
Terrain mesh is pretty simple. It’s the shape of the ground depicted as elevation points spaced on a grid. In most of the world this grid is 612m between postings, so that misses most of the details of the real-life ground, causing jaggy peaks to look like rounded bumps.
Toposim Continents terrain mesh raises the resolution to only 19m between elevation postings, so it greatly enhances the detail and accuracy of the elevation grid, as the source data is derived from real-world measurements.
Yes, it works great with MegaScenery. MegaScenery is ground textures based on actual georeferenced aerial and satellite photographs. So Toposim Continent and MegaScenery works fine together, compliments each other. Toposim provides the shape of the ground and MegaScenery would be the textures draped over that shape. Similar compatibility with Flight1 Ultimate Terrain and Orbx Vectors products They all work together to improve the default scenery greatly.
Let me know if you have further questions.
Thanks
Justin