那个深度检测和对数深度具体有啥用？一直没明白。

深度检测是保证 距离近的东西 盖住 距离远的东西，如果禁用深度检测，那么会导致 后渲染的东西 总是 盖住 先渲染的东西，而不考虑其远近距离

康佩锋2 8:11:44
对数深度是因为cesium的坐标范围过大，渲染的时候深度缓冲的精度不够（距离越远误差越多，非线性），cesium既要保证近处可见，也要保证远处的东西深度覆盖正确，这就是一个两难的选择。对数深度是一种技术，可以把深度的递减修改为对数变化，这样有利满足上面说的效果，当然它也有弊端，过大的平面容易被裁减

The issue names depth testing and logarithmic depth but provides no file, test, or entry point. First clarify whether a documentation change is wanted and where these settings are exposed. Done would mean a project-specific explanation of both features, their trade-offs, and how users should choose them.

Written by the indexing model from the issue text.