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Maniphest T86752

EEVEE fireflies along faces
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Description

**System Information**
Operating system: Windows 10 Home
Graphics card: RTX 3070 Laptop

Blender Version
Broken: 2.93.0 Alpha 9b806c49d08a master
Worked: 2.92

Short description of error
EEVEE creates white fireflies along faces that are parallel to the camera.

Exact steps for others to reproduce the error
Enter a scene with a cube or flat object, adjust the camera so it looks almost parallel or very low angle along the flat face and EEVEE will produce white fireflies along the face. Enabling depth of field and bloom makes the bug easier to see, but is not the cause of it. Test on GTX 1060 Desktop does not reproduce the bug.


Firefly Bug.blend764 KBDownload

Related Objects

Event Timeline

Martin Ivanov (MadRabidz) created this task.Mar 20 2021, 1:54 AM
Martin Ivanov (MadRabidz) added a project: EEVEE & Viewport.Mar 20 2021, 2:07 AM
Giampaolo (joaulo) added a subscriber: Giampaolo (joaulo).Mar 22 2021, 12:01 PM
piero (pix_d) added a subscriber: piero (pix_d).Mar 22 2021, 12:32 PM
Travis (Travis) added a subscriber: Travis (Travis).Mar 29 2021, 1:56 PM
Nerijus (PaganHead) added a subscriber: Nerijus (PaganHead).Mar 30 2021, 12:24 PM

In animation this effect will appear only in some frames. Changing render resolution % get's rid of it

Fireflies.blend788 KBDownload
.

Spencer Singer (MLSpence) added a subscriber: Spencer Singer (MLSpence).Mar 30 2021, 6:03 PM
Andres Stephens (Draise) awarded a token.EditedApr 2 2021, 1:33 AM
Andres Stephens (Draise) added a subscriber: Andres Stephens (Draise).

Can confirm, this is due to the new Fresnel is BSDF pbr materials. The optimized fresnel from 2.92 didin't have this, but they changed the code and instroduced this with 2.93.

This task should be a high priority.


2.92


2.93

Andres Stephens (Draise) added a comment.EditedApr 2 2021, 1:46 AM

Relevant tasks:
https://developer.blender.org/T86795
https://developer.blender.org/T86578

Dalai Felinto (dfelinto) closed this task as a duplicate of T86578: white artifacts in EEVEE.Apr 8 2021, 5:29 PM