Eevee spotlight clipping through solid objects while using Principled Volume #73551

New Issue

Marcelo P Freitas · 2020-02-02T21:49:35+01:00

Marcelo P Freitas commented

2020-02-02 21:49:35 +01:00

System Information

AMD® Ryzen 7 1700x eight-core processor × 16
16 GB
Operating system:
Either Windows 10 or Debian 10
Graphics card:
GeForce GTX 1060 6GB/PCIe/SSE2

Blender Version
Broken: (example: 2.80, edbf15d3c0, master, 2018-11-28, as found on the splash screen)
Worked: (optional)

system-info.txt
Volumetric_with_spotLight.blend

Short description of error
If you use a spotlight inside a solid object (Simulating a lamp reflector) and you use principled volume on your scene when you render,
you can see the light in the other side of object. Like as an interference.

Exact steps for others to reproduce the error
You can reproduce in the blender file attached.

**System Information** - AMD® Ryzen 7 1700x eight-core processor × 16 - 16 GB Operating system: - Either Windows 10 or Debian 10 Graphics card: - GeForce GTX 1060 6GB/PCIe/SSE2 **Blender Version** Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen) Worked: (optional) [system-info.txt](https://archive.blender.org/developer/F8317848/system-info.txt) [Volumetric_with_spotLight.blend](https://archive.blender.org/developer/F8317850/Volumetric_with_spotLight.blend) ![spotlightvisible.png](https://archive.blender.org/developer/F8317877/spotlightvisible.png) **Short description of error** If you use a spotlight inside a solid object (Simulating a lamp reflector) and you use principled volume on your scene when you render, you can see the light in the other side of object. Like as an interference. **Exact steps for others to reproduce the error** You can reproduce in the blender file attached.

Marcelo P Freitas commented

2020-02-02 21:49:35 +01:00

Added subscriber: @MarceloPereiradeFreitas

blender-admin commented

2020-02-02 21:49:35 +01:00

#96257 was marked as duplicate of this issue

Richard Antalik commented

2020-02-03 08:38:26 +01:00

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

Jeroen Bakker commented

2020-02-03 11:02:48 +01:00

Added subscribers: @fclem, @Jeroen-Bakker

Jeroen Bakker commented

2020-02-03 11:02:48 +01:00

This is related to a known limitation of eevee https://docs.blender.org/manual/en/latest/render/eevee/limitations.html

Volume Objects
  Object volume shaders will affect the whole bounding box of the object. The shape of the volume must be adjusted using procedural texturing inside the shader.

As the implementation is working as designed this is not considered a bug. @fclem Do you want this to be marked as a Known Issue or Invalid?

This is related to a known limitation of eevee https://docs.blender.org/manual/en/latest/render/eevee/limitations.html ``` Volume Objects Object volume shaders will affect the whole bounding box of the object. The shape of the volume must be adjusted using procedural texturing inside the shader. ``` As the implementation is working as designed this is not considered a bug. @fclem Do you want this to be marked as a `Known Issue` or `Invalid`?

Clément Foucault commented

2020-02-08 00:04:39 +01:00

Changed status from 'Confirmed' to: 'Archived'

Clément Foucault closed this issue

2020-02-08 00:04:39 +01:00

Clément Foucault self-assigned this 2020-02-08 00:04:39 +01:00

Clément Foucault commented

2020-02-08 00:04:39 +01:00

It is a limitation because the step size is way too high (i.e: "Sample" is way too low compared to "Start", "End" and "Distribution" is tuned too far from 1.0) so light from further froxels (frustum aligned voxels) bleeds light onto closer geometry because of linear interpolation.

Pratik Borhade commented

2022-03-09 10:50:45 +01:00

Added subscribers: @joaulo, @PratikPB2123

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Eevee spotlight clipping through solid objects while using Principled Volume #73551