Cycles: Volume Emission turns black when strength is 0 or color is black #51553

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opened 2017-05-18 22:10:12 +02:00 by Gottfried Hofmann · 7 comments

Gottfried Hofmann commented

2017-05-18 22:10:12 +02:00

System Information
Operating system and graphics card

Linux x64 Geforce GTX 1070

Blender Version
Broken: 2.78c; 2.75a onwards
Worked: 2.74

Short description of error
When the strength of an emission shader plugged into the volume output is 0.0 or black, the object becomes solid black.
In versions up to 2.74 it became transparent (which is the expected behaviour since it fades out with darker colors or lower strength).

Exact steps for others to reproduce the error

Open attached .blend: 0emission_volume.blend
Render or change viewport to rendered: solid black cube
Change strength in emission shader to 0.01 to get a near-transparent result.

**System Information** Operating system and graphics card Linux x64 Geforce GTX 1070 **Blender Version** Broken: 2.78c; 2.75a onwards Worked: 2.74 **Short description of error** When the strength of an emission shader plugged into the volume output is 0.0 or black, the object becomes solid black. In versions up to 2.74 it became transparent (which is the expected behaviour since it fades out with darker colors or lower strength). **Exact steps for others to reproduce the error** - Open attached .blend: [0emission_volume.blend](https://archive.blender.org/developer/F603066/0emission_volume.blend) - Render or change viewport to rendered: solid black cube - Change strength in emission shader to 0.01 to get a near-transparent result.

Gottfried Hofmann commented

2017-05-18 22:10:12 +02:00

Author

Changed status to: 'Open'

Changed status to: 'Open'

Gottfried Hofmann commented

2017-05-18 22:10:12 +02:00

Author

Added subscriber: @GottfriedHofmann

Added subscriber: @GottfriedHofmann

blender-admin commented

2017-05-19 04:59:35 +02:00

This issue was referenced by blender/cycles@f6e7031058

This issue was referenced by blender/cycles@f6e70310586a5981af63f5437021af71d043a668

Lukas Stockner commented

2017-05-19 05:04:41 +02:00

Member

Added subscriber: @LukasStockner

Added subscriber: @LukasStockner

Lukas Stockner commented

2017-05-19 05:04:41 +02:00

Member

Changed status from 'Open' to: 'Resolved'

Changed status from 'Open' to: 'Resolved'

Lukas Stockner closed this issue

2017-05-19 05:04:41 +02:00

Lukas Stockner self-assigned this 2017-05-19 05:04:41 +02:00

Lukas Stockner commented

2017-05-19 05:04:41 +02:00

Member

Fixed with 4a04d7ae89, thanks for the report.

Fixed with 4a04d7ae89, thanks for the report.

Karsten Bitter commented

2017-05-19 09:18:42 +02:00

Added subscriber: @KarstenBitter

Added subscriber: @KarstenBitter

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Reference: blender/blender#51553

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