Possible Z-fighting background images using Depth = Both #60484

New Issue

Rombout Versluijs · 2019-01-14T02:02:52+01:00

Rombout Versluijs commented

2019-01-14 02:02:52 +01:00

System Information
OSX 10.11.6
Intel Iris Pro 1536 MB

Blender Version
2.80, 3c3d80ea22, 2019-01-08 23:33

Short description of error
It looks like the new method for background images has a small issue when Depth is set to Both. It looks like there is some kind of Z-fighting or normal issue perhaps. It looks like noise, weird effect

Exact steps for others to reproduce the error

Use any scene or new scene as long as there are object in the viewport
Add image as Empty
Use any image and place it around an object or in between
Now hovering the mouse over the image or moving the scene will show a weird noise kind of effect. Sort of like normals or z-fighting
setting Depth to Front or Back solves this "issue"

Ive attached a screengrab of this

**System Information** OSX 10.11.6 Intel Iris Pro 1536 MB **Blender Version** 2.80, 3c3d80ea22af, 2019-01-08 23:33 **Short description of error** It looks like the new method for background images has a small issue when Depth is set to Both. It looks like there is some kind of Z-fighting or normal issue perhaps. It looks like noise, weird effect **Exact steps for others to reproduce the error** 1. Use any scene or new scene as long as there are object in the viewport 2. Add image as Empty 3. Use any image and place it around an object or in between 4. Now hovering the mouse over the image or moving the scene will show a weird noise kind of effect. Sort of like normals or z-fighting 5. setting Depth to Front or Back solves this "issue" Ive attached a screengrab of this ![Z-fighting-or-normal-issue-ref-images.gif](https://archive.blender.org/developer/F6280493/Z-fighting-or-normal-issue-ref-images.gif)

Rombout Versluijs commented

2019-01-14 02:02:52 +01:00

Added subscriber: @RomboutVersluijs

blender-admin commented

2019-01-14 02:02:52 +01:00

#60846 was marked as duplicate of this issue

Jacques Lucke commented

2019-01-14 10:32:20 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-01-14 10:32:20 +01:00

Can't reproduce it on my machine right now. Could you create a .blend file that shows the bug (on your machine)? Make sure to pack the image into the file.

Rombout Versluijs commented

2019-01-14 17:40:16 +01:00

Here is a file

Image-ref-depth-issue.blend

Here is a file [Image-ref-depth-issue.blend](https://archive.blender.org/developer/F6286899/Image-ref-depth-issue.blend) ![Screen Shot 2019-01-14 at 12.38.20.png](https://archive.blender.org/developer/F6286891/Screen_Shot_2019-01-14_at_12.38.20.png)

Jacques Lucke commented

2019-01-14 17:47:16 +01:00

Added subscriber: @fclem

Jacques Lucke commented

2019-01-14 17:47:16 +01:00

Looks fine when I open it, so it is probably gpu/os related..
Are your drivers up to date?

Looks fine when I open it, so it is probably gpu/os related.. Are your drivers up to date? ![Screenshot from 2019-01-14 17-46-05.png](https://archive.blender.org/developer/F6286942/Screenshot_from_2019-01-14_17-46-05.png)

Rombout Versluijs commented

2019-01-14 17:50:53 +01:00

I dont have supported GPU, nothing to update. See first post for Hardware. Its an Intel Iris Pro.

Is the setting still the same? Thinking about it, why does it show being behind a object, what is default when you can choose front or back??
Is front default or is back default?

I dont have supported GPU, nothing to update. See first post for Hardware. Its an Intel Iris Pro. Is the setting still the same? Thinking about it, why does it show being behind a object, what is default when you can choose front or back?? Is front default or is back default?

Rombout Versluijs commented

2019-01-14 17:57:47 +01:00

I see perhaps the cause now. If i change MultiSample under Preferences > General > OpenCL > MultiSampling from None to 2 or more it gets less noticeable.
But still shows very faint,.

Before

After

I see perhaps the cause now. If i change MultiSample under Preferences > General > OpenCL > MultiSampling from None to 2 or more it gets less noticeable. But still shows very faint,. Before ![Screen Shot 2019-01-14 at 12.38.20.png](https://archive.blender.org/developer/F6287008/Screen_Shot_2019-01-14_at_12.38.20.png) After ![Screen Shot 2019-01-14 at 12.52.42.png](https://archive.blender.org/developer/F6287006/Screen_Shot_2019-01-14_at_12.52.42.png)

Brecht Van Lommel commented

2019-01-25 13:03:53 +01:00

Added subscribers: @santbg, @brecht, @WilliamReynish

Mohamed El Hamd commented

2019-01-31 20:01:01 +01:00

Added subscriber: @elbox01

Santy Berrones commented

2019-03-12 17:10:31 +01:00

This problem doesn't just appear on my mac when I reported it. I just found out that it also appears on the work computer.

BugWindows.blend
System Information
Operating system: Windows 10, Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz 3.40 GHz, 16,0 GM (RAM)
Graphics card: Intel(R) HD Graphics 4600
Blender Version
blender-2.80-936014ea8c74-win64, 2019-03-12
Short description of error
When dragging an image to the ViewPort and placing an object in front of or behind it presents a noise in the image
Exact steps for others to reproduce the error

Start Blender
Drag an image to the viewport
I place a plane or a cube in front or behind and noise appears in the image.

This problem doesn't just appear on my mac when I reported it. I just found out that it also appears on the work computer. ![Capture.png](https://archive.blender.org/developer/F6810515/Capture.png) [BugWindows.blend](https://archive.blender.org/developer/F6810517/BugWindows.blend) **System Information** **Operating system:** Windows 10, Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz 3.40 GHz, 16,0 GM (RAM) **Graphics card:** Intel(R) HD Graphics 4600 **Blender Version** blender-2.80-936014ea8c74-win64, 2019-03-12 **Short description of error** When dragging an image to the ViewPort and placing an object in front of or behind it presents a noise in the image Exact steps for others to reproduce the error 1. Start Blender 2. Drag an image to the viewport 3. I place a plane or a cube in front or behind and noise appears in the image.

Clément Foucault was assigned by Jacques Lucke

2019-03-12 17:16:31 +01:00

Rombout Versluijs commented

2019-03-12 20:24:21 +01:00

My guess is that the default none. For me it works when i choose front or back. Perhaps this is the issue, the old version had only 2 options, this now has basically 3.

Santy Berrones commented

2019-03-21 04:06:39 +01:00

Mac Version: blender-2.80.0-git20190321.9105e1d08467-x86_64 (2019-03-21) work fine for me. Check it up

Rombout Versluijs commented

2019-03-22 23:47:21 +01:00

I used this one, edbf15d3c0, master, 2018-11-28, from Blender and seems to work fine now :)

https://www.dropbox.com/s/w4s8xmgmq7dylsf/Z-fighting-or-normal-issue-ref-images-solved.gif?raw=1

I used this one, edbf15d3c044, master, 2018-11-28, from Blender and seems to work fine now :) https://www.dropbox.com/s/w4s8xmgmq7dylsf/Z-fighting-or-normal-issue-ref-images-solved.gif?raw=1

Clément Foucault commented

2019-03-23 00:30:42 +01:00

does using the "use alpha" option also work?

Rombout Versluijs commented

2019-03-23 00:34:42 +01:00

Yes, hardly visible due to the blunt Axis colors. But it seems to work.

Not sure why, but looks like Axis colors are slight transparent orso. They are less vibrant than the color input in the Theme panel

Yes, hardly visible due to the blunt Axis colors. But it seems to work. ![Screen Shot 2019-03-22 at 19.31.46.png](https://archive.blender.org/developer/F6867341/Screen_Shot_2019-03-22_at_19.31.46.png) Not sure why, but looks like Axis colors are slight transparent orso. They are less vibrant than the color input in the Theme panel

Clément Foucault commented

2019-03-23 02:59:02 +01:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-03-23 02:59:02 +01:00

Clément Foucault commented

2019-03-23 02:59:03 +01:00

Ok the axes are going through but that's a side effect of alpha blending. So main issue is resolved.

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Possible Z-fighting background images using Depth = Both #60484