Eevee reflection plane glitching #77012

New Issue

Nadir Zouaoui · 2020-05-24T02:23:30+02:00

Nadir Zouaoui commented

2020-05-24 02:23:30 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: AMD Radeon RX 580 2048SP ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27016

Blender Version
Broken: 2.8 to 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4ca
Worked: None

Short description of error
I have a floor with a reflection plane on it, first renders were perfectly fine but as I do more renders, reflection planes begin misbehaving randomly, it starts out fine but gets progressively worse, here are two consecutive frames one with good reflections, the second glitched, with a perfect mirror for reference:

It only happens with reflection planes, not with plain SSR or cubemaps.

What I have tried: All the SSR options, reflection plane settings, increasing samples, shadow size and soft shadow, different materials, AO and bloom.

I created a new scene with only a perfect mirror and a sphere to reflect, same thing, it's not something to do with my scene:

GIF:

The only thing that momentarily helps letting Blender "rest", then it gets worse over time (clean to messy frames ratio).

Exact steps for others to reproduce the error

Open attached file
Go to render preview

Reflection plane.blend

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: AMD Radeon RX 580 2048SP ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27016 **Blender Version** Broken: 2.8 to 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: `375c7dc4ca` Worked: None **Short description of error** I have a floor with a reflection plane on it, first renders were perfectly fine but as I do more renders, reflection planes begin misbehaving randomly, it starts out fine but gets progressively worse, here are two consecutive frames one with good reflections, the second glitched, with a perfect mirror for reference: |![image.png](https://archive.blender.org/developer/F8549969/image.png)|![image.png](https://archive.blender.org/developer/F8549971/image.png) | -- | -- | It only happens with reflection planes, not with plain SSR or cubemaps. What I have tried: All the SSR options, reflection plane settings, increasing samples, shadow size and soft shadow, different materials, AO and bloom. I created a new scene with only a perfect mirror and a sphere to reflect, same thing, it's not something to do with my scene: GIF: ![plane_prob_bug.gif](https://archive.blender.org/developer/F8574454/plane_prob_bug.gif) The only thing that momentarily helps letting Blender "rest", then it gets worse over time (clean to messy frames ratio). **Exact steps for others to reproduce the error** 1. Open attached file 2. Go to render preview [Reflection plane.blend](https://archive.blender.org/developer/F8550734/Reflection_plane.blend)

Nadir Zouaoui commented

2020-05-24 02:23:30 +02:00

Added subscriber: @NAD4

Clément Foucault commented

2020-05-24 12:59:16 +02:00

Added subscriber: @fclem

Clément Foucault commented

2020-05-24 12:59:16 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Clément Foucault commented

2020-05-24 12:59:16 +02:00

Thank for the report. But please provide a test .blend file so we can quickly test to reproduce.

Also please specify the Exact steps for others to reproduce the error using the said file.

Thank for the report. But please provide a test .blend file so we can quickly test to reproduce. Also please specify the **Exact steps for others to reproduce the error** using the said file.

Nadir Zouaoui commented

2020-05-24 14:05:18 +02:00

In #77012#937667, @fclem wrote:
Thank for the report. But please provide a test .blend file so we can quickly test to reproduce.

Also please specify the Exact steps for others to reproduce the error using the said file.

As I said the issue is not replicable on other systems and begins to appear after consecutive renders for mine.

Reflection plane.blend

Exact steps for others to reproduce the error

Put reflection plane on a reflective surface.
Watch reflections glitch out.

> In #77012#937667, @fclem wrote: > Thank for the report. But please provide a test .blend file so we can quickly test to reproduce. > > Also please specify the **Exact steps for others to reproduce the error** using the said file. As I said the issue is not replicable on other systems and begins to appear after consecutive renders for mine. [Reflection plane.blend](https://archive.blender.org/developer/F8550734/Reflection_plane.blend) **Exact steps for others to reproduce the error** 1. Put reflection plane on a reflective surface. 2. Watch reflections glitch out.

Campbell Barton commented

2020-06-02 09:38:00 +02:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

Germano Cavalcante commented

2020-06-03 17:07:13 +02:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Germano Cavalcante commented

2020-06-03 17:09:13 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-06-03 17:09:13 +02:00

I can confirm the problem.
I updated the description to make the problem more evident.
I wonder if it's only with AMD GPUs.

Operating system: Windows-10-10.0.18941 64 Bits
Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13586 Core Profile Context 19.50.01.05 26.20.15001.5006

I can confirm the problem. I updated the description to make the problem more evident. I wonder if it's only with AMD GPUs. ---- **Operating system:** Windows-10-10.0.18941 64 Bits **Graphics card:** Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13586 Core Profile Context 19.50.01.05 26.20.15001.5006

Germano Cavalcante commented

2020-06-09 20:22:32 +02:00

Closed as duplicate of #77672

Germano Cavalcante closed this issue

2020-06-09 20:22:32 +02:00

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Eevee reflection plane glitching #77012