There is no single process, but many smaller processes that mesh together to form the seemingly unified process at that level.
并不存在单一的过程，很多小的过程编织在一起形成了似乎是同一层次的统一过程。
2
We want a single continuous mesh from the foreground all the way to the horizon, with no cracks or T-junctions.
我们需要一个没有破裂和T错误的连续网格从眼前一直延伸到地平线。
3
For example, if you have an airplane, you would model two versions. One where the plane consists of a single GameObject with Mesh Renderer and scripts for airplane physics.