This may have been mentioned before, but it looks like the environment artist who created this area accidentally put a rock over the top of some blades of tall grass, and the grass is now clipping through the rock. I thought stuff like this went through an art review during the Alpha phase, but I suppose it's an easy one to miss if you're not actually play-testing the level itself.

 

Probably too late to fix since the area has most likely received it's paint over pass, but I thought I may as well mention it anyway juuuust in case it can be fixed.

 

 

 

Locks like something that can easily be painted over.