2.93 DOF refactor - artifact #85845

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.93.0 Alpha, branch: eevee-dof-refactor, commit date: 2021-01-28 18:32, hash: 5db9a008b9

Short description of error
2.93's DOF sometimes confuses which parts of view should be sharp/blurred. Screenshot, video clip and simplified .blend attached to check out.

Exact steps for others to reproduce the error

open .blend file
use mouse scroll wheel to zoom in/out viewport (camera stays locked)
you should notice artifacts disappear/appear depending on scrolling

marked 2 artifacts -
video clip - https://streamable.com/5p9s0h
.blend file to download - https://drive.google.com/file/d/10oKYeV_wy0Yx5V0cdhsg4boQauaV74lq/view?usp=sharing

Added subscriber: @tonpix

Changed status from 'Needs Triage' to: 'Confirmed'

Added subscriber: @fclem

I could not reproduce on my AMD workstation. I will have to test on another hardware configuration.

Added subscriber: @TimBrown

this is normal. that are the different distances from the camera.
in the old system it was the same

In #85845#1129410, @TimBrown wrote:
this is normal. that are the different distances from the camera.
in the old system it was the same

Could you explain it further?

So im not a developer but i think of my use of the dof that the dof has steps. So i think that has to be a feature to interpolate the steps ore blend the steps into each other. Am i right?

No idea, but =<2.92 didn't have these artifacts, it's new. Dev mentioned tiles not being calculated correctly, so maybe it's a screenspace thing?

@fclem Any successes in reproducing issue on another hardware?

Added subscriber: @Sparazza

This issue was referenced by 45d3303ae4

Changed status from 'Confirmed' to: 'Resolved'

@fclem That's fantastic, just checked out .blend file and I don't see artifacts originally reported in first post. However, I've noticed some strange outlines - their appearance depend on how you zoom in/out in viewport and on value of F-Stop in camera settings. Is it an known issue? Enabled Jitter in DOF settings solves it, if it helps.

At 0.2 F-stop:

At 0.1 F-stop outliner dissapears from character and appears on window frame:

EDIT:
Recorded behaviour:
https://files.catbox.moe/9us50c.mp4

EDIT2:
Seems this outline artifact doesn't seems to be apparent in renders

I've noticed also jagged artifact, camera height position and viewport zoom in/out affect it - there's recording:

https://files.catbox.moe/biz6p4.mp4

Forgot to add blender/system info - it's for this and previous post:
System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.11

Blender Version
Broken: version: 2.93.0 Beta, branch: master, commit date: 2021-05-15 16:29, hash: 610c0ecc3b

EDIT:
I've quickly tested DOF parameters in Render properties:

lowering or upping Neighbout Rejection mitigates it (albeit with different looks)
setting Denoise Amount to 0.95-1 mitigates it

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2.93 DOF refactor - artifact #85845