Cascaded shadows produced with EEVEE with orthographic camera loose resolution. #82797

New Issue

Luciano Muñoz Sessarego · 2020-11-17T19:53:21+01:00

2020-11-17 19:53:21 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-11-16 21:19, hash: 09045ff64d
Worked: no idea?

Short description of error
As you can see in the image below, to the left side we have an orthographic camera, to the right we have a normal perspective view and the shadows are broken through the orthographic one,

Exact steps for others to reproduce the error
Create a new scene
Put a plane to cast shadows from the light source
select the camera and switch it to orthographic.
turn the light to sun light
tada!

It doesn't seem to happen with the lights in either point, spot or area.

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce RTX 2070 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30 **Blender Version** Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-11-16 21:19, hash: `09045ff64d` Worked: no idea? **Short description of error** As you can see in the image below, to the left side we have an orthographic camera, to the right we have a normal perspective view and the shadows are broken through the orthographic one, ![2020-11-17 18_50_12-Settings.png](https://archive.blender.org/developer/F9313128/2020-11-17_18_50_12-Settings.png) **Exact steps for others to reproduce the error** Create a new scene Put a plane to cast shadows from the light source select the camera and switch it to orthographic. turn the light to sun light tada! It doesn't seem to happen with the lights in either point, spot or area.

Luciano Muñoz Sessarego commented

2020-11-17 19:53:21 +01:00

Added subscriber: @LucianoMunoz

Philipp Oeser commented

2020-11-18 09:49:21 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-18 09:49:21 +01:00

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

Philipp Oeser commented

2020-11-18 09:49:21 +01:00

Cannot reproduce here:

#82797.blend

Does above file work for you?
Please share your own minimal example file

Cannot reproduce here: ![image.png](https://archive.blender.org/developer/F9316149/image.png) [#82797.blend](https://archive.blender.org/developer/F9316156/T82797.blend) - Does above file work for you? - Please share your own minimal example file

Luciano Muñoz Sessarego commented

2020-11-18 11:51:25 +01:00

That one does work, but even with the same setting everything in default doesn't work for me.
Here is a minimal example file:
T82797_looch.blend

That one does work, but even with the same setting everything in default doesn't work for me. Here is a minimal example file: [T82797_looch.blend](https://archive.blender.org/developer/F9316527/T82797_looch.blend)

Philipp Oeser commented

2020-12-11 18:08:27 +01:00

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

Philipp Oeser commented

2020-12-11 18:28:56 +01:00

Sorry this slipped through, will inspect again

Philipp Oeser commented

2020-12-22 13:52:59 +01:00

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

Philipp Oeser commented

2020-12-22 13:52:59 +01:00

Added subscriber: @fclem

Philipp Oeser commented

2020-12-22 13:52:59 +01:00

Not entirely sure why this is, will confirm for now.

You can get a bit better by using the highest cascade resolution:
T82797_looch_highest_cascade_res.blend

But there seems to be a considerable quality loss in orthographic
The comment in the doces regarding orthographic does not really help me understand this phenomenom either:
https://docs.blender.org/manual/en/dev/render/eevee/lighting.html#cascaded-shadow-map

In orthographic view the cascades cover the whole depth range of the camera with an evenly distributed shadow precision.

@fclem: is this expected behavior?

Not entirely sure why this is, will confirm for now. You can get a bit better by using the highest cascade resolution: [T82797_looch_highest_cascade_res.blend](https://archive.blender.org/developer/F9525260/T82797_looch_highest_cascade_res.blend) But there seems to be a considerable quality loss in orthographic The comment in the doces regarding orthographic does not really help me understand this phenomenom either: https://docs.blender.org/manual/en/dev/render/eevee/lighting.html#cascaded-shadow-map > In orthographic view the cascades cover the whole depth range of the camera with an evenly distributed shadow precision. @fclem: is this expected behavior?

Philipp Oeser changed title from ~~Wrong shadows in produced with EEVEE with orthographic camera.~~ to Cascaded shadows produced with EEVEE with orthographic camera loose resolution.

2020-12-22 13:53:51 +01:00

Clément Foucault commented

2021-10-15 20:40:15 +02:00

is this expected behavior?

Unfortunately yes. Your scene is about 10m from you camera. Your camera has about 1000m of depth to cover. Your scene will only cover 1% of the shadow map.

That said I don't remember the reasoning behind this. I guess this is to avoid loosing the shadows when toggling orthographic view. In viewport orthographic mode the depth range is "doubled" and starts way behind the point of interest. So if we were to reduce the covered depth range, none of the object shadowed in perspective view would keep their shadows.

I could make an exception for Camera Ortho view since the depth range should match the one of the Camera Persp view.

> is this expected behavior? Unfortunately yes. Your scene is about 10m from you camera. Your camera has about 1000m of depth to cover. Your scene will only cover 1% of the shadow map. That said I don't remember the reasoning behind this. I guess this is to avoid loosing the shadows when toggling orthographic view. In viewport orthographic mode the depth range is "doubled" and starts way behind the point of interest. So if we were to reduce the covered depth range, none of the object shadowed in perspective view would keep their shadows. I could make an exception for Camera Ortho view since the depth range should match the one of the Camera Persp view.

Luciano Muñoz Sessarego commented

2021-10-15 20:43:04 +02:00

That'd be cool

Philipp Oeser removed the

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Cascaded shadows produced with EEVEE with orthographic camera loose resolution. #82797