Weird transparency bug Alpha Blend [EEVEE] #65756

New Issue

Chris · 2019-06-12T15:42:52+02:00

Chris commented

2019-06-12 15:42:52 +02:00

System Information
Operating system: Darwin-18.6.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 560 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.9.26

Blender Version
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-11 21:45, hash: d93a7290e5
Worked: (optional)

Short description of error
I have an object that is emissive, and is set to Alpha Blend, because it has a gradient that fades to transparent.
It won't show the results, neither in viewport and rendered, only if I add an unconnected Diffuse or Principled BSDF.
Sometime it works even when disconnected multiple times from the material output.

But on a fresh start it won't work when set to Alpha Blend, and an unconnected diffuse or principled bsdf needs to be added in order to update the object with the material.

**System Information** Operating system: Darwin-18.6.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 560 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.9.26 **Blender Version** Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-11 21:45, hash: `d93a7290e5` Worked: (optional) **Short description of error** I have an object that is emissive, and is set to Alpha Blend, because it has a gradient that fades to transparent. It won't show the results, neither in viewport and rendered, only if I add an unconnected Diffuse or Principled BSDF. Sometime it works even when disconnected multiple times from the material output. But on a fresh start it won't work when set to Alpha Blend, and an unconnected diffuse or principled bsdf needs to be added in order to update the object with the material.

Chris commented

2019-06-12 15:42:52 +02:00

Added subscriber: @Decaeneus

Sebastian Parborg commented

2019-06-17 16:00:37 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-06-17 16:00:37 +02:00

Can you attach an example file?

Chris commented

2019-06-26 15:00:15 +02:00

example.blend

Sorry for the late reply
Here is a video as well

[example.blend](https://archive.blender.org/developer/F7549916/example.blend) Sorry for the late reply Here is a video as well [[ https://www.youtube.com/watch?v=wzMoorkw_FM ]]

Sebastian Parborg commented

2019-06-28 17:32:45 +02:00

It seems to work for me with that file. Does this still happen for you with the latest beta?

Chris commented

2019-06-28 23:12:05 +02:00

Yes, I switched to Windows on my mac to see if maybe the OS has anything to do with this, downloaded the latest beta, it doesn't work.
This is weird...

Yes, I switched to Windows on my mac to see if maybe the OS has anything to do with this, downloaded the latest beta, it **doesn't work**. This is weird...

Sebastian Parborg commented

2019-07-01 10:29:59 +02:00

Are you using the latest drivers on windows?

Chris commented

2019-07-01 10:38:16 +02:00

Yes, I keep everything up to date, both on mac OS and Windows 10.
I'm on a Macbook pro

Yes, I keep everything up to date, both on mac OS and Windows 10. I'm on a Macbook pro

Sebastian Parborg commented

2019-07-01 10:53:14 +02:00

Added subscriber: @Jeroen-Bakker

Sebastian Parborg commented

2019-07-01 10:53:14 +02:00

@Jeroen-Bakker can you reproduce this with the proprietary drivers?

Alex commented

2019-07-17 12:20:43 +02:00

Added subscriber: @SpectreFirst

Alex commented

2019-07-17 12:20:43 +02:00

Just in case, I was able to reproduce this on my Windows 7 and AMD HD7700 (doesn’t work until you add Principled or Diffuse shader even if it’s not connected to anything) but on my Windows 8 and NVidia 750 everything worked right away.
EDIT - did another try on latest 4a5e046c92 from 2019-07-16 and it seems to be working even on my AMD 7700 right away as well. Earlier build still doesn't work so it looks like something was fixed in that area.

Just in case, I was able to reproduce this on my Windows 7 and AMD HD7700 (doesn’t work until you add Principled or Diffuse shader even if it’s not connected to anything) but on my Windows 8 and NVidia 750 everything worked right away. EDIT - did another try on latest 4a5e046c923f from 2019-07-16 and it seems to be working even on my AMD 7700 right away as well. Earlier build still doesn't work so it looks like something was fixed in that area.

Richard Antalik commented

2020-01-02 07:09:21 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-01-02 07:09:21 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'

Richard Antalik commented

2020-01-02 07:09:21 +01:00

@Decaeneus
I couldn't reproduce this with latest build. Is this still an issue?

@Decaeneus I couldn't reproduce this with latest build. Is this still an issue?

Chris commented

2020-01-08 18:22:07 +01:00

In #65756#840973, @iss wrote:
@Decaeneus
I couldn't reproduce this with latest build. Is this still an issue?

No, at least this didn't happen for quite a few months now.

> In #65756#840973, @iss wrote: > @Decaeneus > I couldn't reproduce this with latest build. Is this still an issue? No, at least this didn't happen for quite a few months now.

Richard Antalik commented

2020-01-08 18:24:01 +01:00

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

Richard Antalik closed this issue

2020-01-08 18:24:01 +01:00

Richard Antalik self-assigned this 2020-01-08 18:24:01 +01:00

Richard Antalik commented

2020-01-08 18:24:01 +01:00

Thanks for info.

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Weird transparency bug Alpha Blend [EEVEE] #65756