Good question, and It’s a good worst case scenario to test!
Obscuring the area that blends is one of the biggest issues with screen space effects. But it looks better than what I expected.
I think the main reason for that is that the effect scales based on available space. So when you obscure it, the blend fades in size. So it never “pops”.
The video is quite bad. When testing what I mostly noticed was the screen tearing from the AA.
Here is a couple of stills of me obscuring the sunken chest. If you look closely you can see that the blend with the sand is smaller when the area is partly occluded. You don’t really notice this in motion except from unrealistically high blend sizes.
