I recently made this African Elephant habitat, which as you can see is nearly 70% covered in Elephant Grass. I didn't realize until after I had copied and pasted over 750 individual pieces that the African Elephants couldn't move around in the habitat at all because of it. I understand why some types of foliage have hitboxes to prevent animals from walking though them, but this is grass after all. Any animal should be able to walk through it, but instead none of them can. This is a really annoying issue, especially if you want to make lush, grassy African habitats, and I honestly don't see a reason why this can't be changed.