A faster approach for quad billboards that provides exactly the same results is provided afterwards.
介绍billboard的.哪位英语达人能帮忙翻译一下.
整段话
The first one is a very simple method but it doesn't provide a real billboard. It is a cheating approach that is very easy to implement. A faster approach for quad billboards that provides exactly the same results is provided afterwards. It is not as easy to implement but there can be a significant difference in speed when using a large number of quad billboards.