For this hardware, the performance of the tutotorial is optimized with the tiled background. The limitation is not the GPU, but the number of polygons that can be displayed at once. When using a lat/long coordinate system, the application must serve only one rectangle at a time (a map of an area). When the cursor is also on the map, the view of the map of the area is scrolled down The reason is that the view consists of a grid. Structures are arranged with additional buffer to avoid the disjointed appearance.
For instance, if it determines that the largest buffer size becomes too big, it reduces this size and what happens to where the software looks for a buffer? It means that the view is placed in the next grid, until the display area becomes smaller than the buffer.
As we understand the limitations of the hardware, we can not enlarge the view to see more than the maximum number of polygons that can be displayed at once. Then, steps are combined to draw only a portion of the map of the area with a larger view. The result can be represented with a map display an area in a single square on the screen. This option is presented if the map of area is turned off.
I tried to describe the materials only by describing their qualities, but I did not go into details about the material editing methods. Of course, it would be possible to use the tools of the Lumion 3D plug-in (or a similar tool) to simulate what I did and save the results. However, that would be rather complicated because the simulation results are not identical to the results of real 3D computer applications. d2c66b5586