Material not rendered on mirrored object #73380

New Issue

Scott · 2020-01-25T03:13:15+01:00

Scott commented

2020-01-25 03:13:15 +01:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: f1aa4d18d4
Worked: (2.79) Also broken in 2.82 January 25/2020

Short description of error
When the material in the attached file is applied to a mirrored object the material does not render on the mirrored object.
Applying the mirror will make the material render. Changing the Multiply node connected to the Emission strength to an add node will cause the material to render. Different math functions produce results. Divide for example does not render.Material.blend
2.79 will render this material on mirrored objects.

Exact steps for others to reproduce the error
Render the image in the attached file. Switch to rendered or material preview in Cycles or Evee.

Expectation would be the materials on mirrored objects would be identical to the object begin mirrored.

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13 **Blender Version** Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: `f1aa4d18d4` Worked: (2.79) Also broken in 2.82 January 25/2020 **Short description of error** When the material in the attached file is applied to a mirrored object the material does not render on the mirrored object. Applying the mirror will make the material render. Changing the Multiply node connected to the Emission strength to an add node will cause the material to render. Different math functions produce results. Divide for example does not render.[Material.blend](https://archive.blender.org/developer/F8300512/Material.blend) 2.79 will render this material on mirrored objects. **Exact steps for others to reproduce the error** Render the image in the attached file. Switch to rendered or material preview in Cycles or Evee. Expectation would be the materials on mirrored objects would be identical to the object begin mirrored.

Scott commented

2020-01-25 03:13:15 +01:00

Added subscriber: @Scotty918

Scott commented

2020-01-25 12:57:58 +01:00

More information I simplified the material to what is shown in this image.
With this material using an add node both the object and the mirrored object render in cycles but not in eevee.

![image.png](https://archive.blender.org/developer/F8301084/image.png) More information I simplified the material to what is shown in this image. With this material using an add node both the object and the mirrored object render in cycles but not in eevee.

Chris Clyne (Lateasusual) commented

2020-01-25 18:35:23 +01:00

Added subscriber: @lateasusual

Chris Clyne (Lateasusual) commented

2020-01-25 18:35:23 +01:00

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

Chris Clyne (Lateasusual) closed this issue

2020-01-25 18:35:23 +01:00

Chris Clyne (Lateasusual) self-assigned this 2020-01-25 18:35:23 +01:00

Chris Clyne (Lateasusual) commented

2020-01-25 18:35:23 +01:00

Not a bug.

In the example file you are using generated texture coordinates which are in object space and not mirrored. Applying the mirror modifier changes the generated texture space, and you can adjust it yourself in the mesh settings under "Texture Space"

With this material using an add node both the object and the mirrored object render in cycles but not in eevee.

EEVEE doesn't support using Emission shaders for volumetrics, use a Principled Volume BSDF node instead.

Not a bug. In the example file you are using generated texture coordinates which are in object space and not mirrored. Applying the mirror modifier changes the generated texture space, and you can adjust it yourself in the mesh settings under "Texture Space" > With this material using an add node both the object and the mirrored object render in cycles but not in eevee. EEVEE doesn't support using Emission shaders for volumetrics, use a Principled Volume BSDF node instead.

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Material not rendered on mirrored object #73380