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Regression: Soft Shadows with sharp shadows looks worse #125564

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opened 2024-07-28 16:14:03 +02:00 by Dan-Gry · 4 comments
Dan-Gry commented 2024-07-28 16:14:03 +02:00
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System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 536.67

Blender Version
Broken: version: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: a51f293548ad
Worked: 4.1

Short description of error
Soft Shadows when having sharp shadows looks way worse, or does not preserv the sharpness

Exact steps for others to reproduce the error
In 4.1, perfect sharp shadows when using soft shadows since its jitters the pixelse to make it look more highres
4.1 - 1 sample
image
4.1 - 8 sample
image
4.1 64 samples
image

In 4.2, it does not jitter the shadows without making the shadows way more soft, its imposible to get as sharp and clean shadows
The shadow resulation is the same as in 4.1, soft shadows are on and radius is 0.001 m on the light

4,2 - 1 sample
image
4.2 - 8 sample
image
4.2 - 64 sample
image

With 0.003 m in radius, now the shadows looks less pixly, but looks way to soft
4,2 1 sample
image

Even with shadows maxed out to 8k and 512 samples it looks worse than 4.1
image

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 536.67 **Blender Version** Broken: version: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: `a51f293548ad` Worked: 4.1 **Short description of error** Soft Shadows when having sharp shadows looks way worse, or does not preserv the sharpness **Exact steps for others to reproduce the error** In 4.1, perfect sharp shadows when using soft shadows since its jitters the pixelse to make it look more highres 4.1 - 1 sample ![image](/attachments/da9731e1-993d-49f8-a077-5009d74fa895) 4.1 - 8 sample ![image](/attachments/4d1972c8-a965-4e8d-85f0-3ef39a7ed96f) 4.1 64 samples ![image](/attachments/53237d28-e1d3-4bf2-8ca6-00c0ea9e9087) In 4.2, it does not jitter the shadows without making the shadows way more soft, its imposible to get as sharp and clean shadows The shadow resulation is the same as in 4.1, soft shadows are on and radius is 0.001 m on the light 4,2 - 1 sample ![image](/attachments/bc6ac373-6e2a-46bc-ad21-a93ca412f7fa) 4.2 - 8 sample ![image](/attachments/6af3bfbd-6351-4593-83b6-ce05ddfe4969) 4.2 - 64 sample ![image](/attachments/ea0836e9-2596-4bd0-ba4f-6f2e68e8ef80) With 0.003 m in radius, now the shadows looks less pixly, but looks way to soft 4,2 1 sample ![image](/attachments/a4271581-e13c-4c33-ada7-f1e8442b0492) Even with shadows maxed out to 8k and 512 samples it looks worse than 4.1 ![image](/attachments/828a6f72-b1cd-4b74-b373-26d0b1a2ec4f)
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Dan-Gry added the
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 labels 2024-07-28 16:14:03 +02:00
Dan-Gry changed title from Regression: Soft Shadows when having sharp shadows to Regression: Soft Shadows when having sharp shadows looks worse 2024-07-28 16:15:35 +02:00
Dan-Gry changed title from Regression: Soft Shadows when having sharp shadows looks worse to Regression: Soft Shadows with sharp shadows looks worse 2024-07-28 16:15:49 +02:00
Pratik Borhade commented 2024-07-29 11:23:48 +02:00
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Hi, thanks for the report. Can confirm though I don't think this is a bug. Soft shadows has been removed in 4.2. And it is possible to control shadow sharpness from light properties panel: Shadow > Filter: image
Does it resolve the issue?

Hi, thanks for the report. Can confirm though I don't think this is a bug. Soft shadows has been removed in 4.2. And it is possible to control shadow sharpness from light properties panel: `Shadow > Filter`: [image](attachments/d4a4c65c-dabe-4b59-bc34-a217615b1890) Does it resolve the issue?
image.png
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Pratik Borhade added
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 labels 2024-07-29 11:24:01 +02:00
Dan-Gry commented 2024-07-29 11:52:19 +02:00
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Hi, thanks for the report. Can confirm though I don't think this is a bug. Soft shadows has been removed in 4.2. And it is possible to control shadow sharpness from light properties panel: Shadow > Filter: image
Does it resolve the issue?

Hi, the new shadow filter works really well when you want more soft shadows, but currently it impossiable to get nice crisp shadows as in leagacy Eevee without the shadow looking low res.

Eevee legacy, maxed out 4k shadows and soft shadows.
image
Eevee Next, maxed out 8k shadows and soft shadows, notice the low res edges, you can not get ride of them without making the shadow way to soft.
image

I think the problem is that the new soft shadow only makes the shadow softer, while the old one interpolated and jittered the shadow even when it was sharp to make it look more high res then it really was.

> Hi, thanks for the report. Can confirm though I don't think this is a bug. Soft shadows has been removed in 4.2. And it is possible to control shadow sharpness from light properties panel: `Shadow > Filter`: [image](attachments/d4a4c65c-dabe-4b59-bc34-a217615b1890) > Does it resolve the issue? Hi, the new shadow filter works really well when you want more soft shadows, but currently it impossiable to get nice crisp shadows as in leagacy Eevee without the shadow looking low res. Eevee legacy, maxed out 4k shadows and soft shadows. ![image](/attachments/2ffa1b31-394a-441e-b78d-30c9ae970351) Eevee Next, maxed out 8k shadows and soft shadows, notice the low res edges, you can not get ride of them without making the shadow way to soft. ![image](/attachments/e50ce619-bdb5-45a4-b06b-2e369eb8459a) I think the problem is that the new soft shadow only makes the shadow softer, while the old one interpolated and jittered the shadow even when it was sharp to make it look more high res then it really was.
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Bart van der Braak added
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 labels 2024-08-14 12:54:32 +02:00
JawSFM commented 2024-08-14 22:30:02 +02:00
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I'd like to add one odd observation:

When using the viewport freely, a very low shadow resolution limit on the sun lamp (0.0001 instead of 0.001) can make the jagged lines look bearable, almost imperceptible from further away.

However when Numpad0 to the viewport camera view (and when doing the actual render) it's like the resolution limit is automatically increased depending on camera distance, without input by the user. "Filter" indeed does not help since it merely dithers the edges for me. Just having the lower resolution limit working when the camera is involved would already help a lot.

Screenshot 1: regular viewport view, kinda acceptable;
Screenshot 2: Camera view, very blocky (no changes to light or render settings)
Screenshot 3: same as 2 with Jitter activated. Still jagged but also blurry now.
Can provide project needed

I'd like to add one odd observation: When using the viewport freely, a very low shadow resolution limit on the sun lamp (0.0001 instead of 0.001) can make the jagged lines look bearable, almost imperceptible from further away. However when Numpad0 to the viewport camera view (and when doing the actual render) it's like the resolution limit is automatically increased depending on camera distance, without input by the user. "Filter" indeed does not help since it merely dithers the edges for me. Just having the lower resolution limit working when the camera is involved would already help a lot. Screenshot 1: regular viewport view, kinda acceptable; Screenshot 2: Camera view, very blocky (no changes to light or render settings) Screenshot 3: same as 2 with Jitter activated. Still jagged but also blurry now. Can provide project needed
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1_Viewport_Regular_View.png
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sun_settings.png 2_Viewport_CameraView_and_RenderResult.png 3_Viewport_CameraView_Jitter.png 1_Viewport_Regular_View.png
JawSFM commented 2024-09-26 13:28:43 +02:00
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Update 4.2.2: The whole "The shadow resolution in renders & camera view is lower than in viewport mode" issue has apparently been resolved.
However crisp shadows without jagged edges like in legacy Eevee are still impossible.

Update 4.2.2: The whole "The shadow resolution in renders & camera view is lower than in viewport mode" issue has apparently been resolved. However crisp shadows without jagged edges like in legacy Eevee are still impossible.
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