They're shadows applied randomly to one of three possible exists. Pictures won't really help you as the sequence is random. In editor they show up as bushes (the ones with a white border). You can see groups of four at each exit below.Would you have a picture of it, by any chance? I have plenty of color showing, but suspect it gets washed out, as it would be green on green.
![1681577598044.png 1681577598044.png](https://attachments.f95zone.to/2023/04/thumb/2571790_1681577598044.png)