New DoF issue in 5.6 (5.5 -> 5.6 regression)

Slavq
Wed, 23 Jul 2025 12:39:12 +0000
Rendering

There is a new issue with Depth of Field in 5.6. When used with any temporal-based anti-aliasing (e.g. TAA or TSR), it produces ugly artifacts on the edges of a mesh:

It is much worse when the object is moving.
Is this a known issue?

Update: I’ve attached the repro project for 5.6. Play to see the much worse artifacts when the mesh moves.
DofRepro 5.6.zip (1023.3 KB)

Update 2: I’ve reported it via the bug submission form. I’ll post any news here if I have any.

Update 3: I’m trying all the DoF and AA-related console variables and setting the “r.DOF.Scatter.BackgroundCompositing” from 2 (default mode) to 1 or 0 seems to fix it!
But I need to test if it doesn’t introduce some other issues.
I wish I could update my bug report somehow, with that new info
Update 3.1: Setting this option to 1 fixes the issue, but the quality of the DoF background suffers a bit. So it’s a temporary half-workaround.

3 posts - 2 participants