Objects with multiple materials are not displaying correctly - transparent faces #70106
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Reference: blender/blender#70106
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System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon R9 M295X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20
Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-19 20:35, hash:
c8df6f2cf9Worked: (optional)
Short description of error
[Objects with multiple materials are not displaying correctly - transparent faces
Exact steps for others to reproduce the error
Make a plane, subdivide a few times, unwrap, assign a material
Select some faces, add a new material, assign it to those faces
The second material now has lots of transparent faces?
Thanks
Wayne
Added subscriber: @slowboy
blender/blender-addons#70277 was marked as duplicate of this issue
#70208 was marked as duplicate of this issue
#70157 was marked as duplicate of this issue
Added subscriber: @JacquesLucke
Please upload a minimal example .blend file, so that we can reproduce the issue more easily.
BadTransparentMultiMaterial.blend
One screenshot is the object in 2.8, red and green mats displaying fine. Second screenshot shows same file opened in 2.81, green is now transparent. Also, if you select some red faces and assign the green mat to them, random green faces will appear... I say 'random', but there does seem to be some method in the madness! Going back and forth between assign faces you will see that the same faces will change, so the wrongness is somehow organised?
I cannot reproduce it here.
Do you have access to another compute to test the file there?
Will test on my Shadow PC - just need to get latest 2.81!....
...Seems fine - bug is not present on PC.
Bug has been present for last 2 Mac releases.
Added subscriber: @lichtwerk
Might be related to {#68826}?
Added subscriber: @jerrsoundripper
I confirm the bug is present on all my MacOsx with AMD RX580, Intel graphics or GTX980. Mojave and High Sierra.
It worked with 2.81 alpha builds 3 or 4 days before.
It works well on windows 10. It is Mac OS related bug
Added subscriber: @Robw
I have the same issue on macOS 10.14.6, AMD Radeon Pro 580X, both with the buildbot version (Blender 2.81.12, 21-sep, hash
c71be416e0) and with a local compiled version (2.81.12, 22-sep, hashc71be416e0). The issue did not appear in versions before that.An object with a single material shows fine, when adding a second material to the mesh, parts randomly become transparent or faces show a different material than assigned. The attached blend file has an object with multiple materials.
Cycles shows the issue in viewport, but renders as expected. Viewport render also works fine
In Eevee, the random disappearance/material mismatch occurs in both viewport render and "F12" render.
The blend file:
ZVW.blend
Added subscribers: @lileo, @dark999, @WayneDixon
Added subscriber: @robbott
I can confirm this bug on OSX 10.13.6. I bisected the bug to commit
3a08153d7a.In my opinion the bug is even visible in the workbench view in the form of two colors of the mesh. See screenshot below. In debug mode, there is no shader error in the terminal.
System Information
Operating system: Darwin-17.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon R9 M370X OpenGL Engine ATI Technologies Inc. 4.1 ATI-1.68.23
Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-23 15:18, hash:
14acac0bb7Added subscriber: @fclem
I cannot reproduce myself (on linux), but I assume this can be confirmed...
@fclem: mind checking?
Added subscriber: @Toxe
Hello, I think I have the same problem.
When I assign multiple materials to different faces of the same object then I only see the first material of the object and all other faces with different materials are transparent.
This happens only with Eevee (Cycles is fine) and I am using the macOS version. I am using the current dev version of Blender (I updated today) and I did not have this problem with a version that was a couple of days older.
**System:**iMac (Retina 5K, 27-inch, Late 2015), macOS Mojave 10.14.5
Blender:
version: 2.81 (sub 12), branch: master, commit date: 2019-09-23 20:20, hash:
5a6ab6f594, type: Releasebuild date: 2019-09-23, 23:24:40
platform: Darwin
renderer: 'AMD Radeon R9 M395 OpenGL Engine'
vendor: 'ATI Technologies Inc.'
version: '4.1 ATI-2.9.26'
Added subscribers: @CookItOff, @MauroPfister
Added subscriber: @ph-1
Hello, same here.
System Information
Operating system: Darwin-17.7.0-x86_64-i386-64bit 64 Bits
Graphics card: NVIDIA GeForce GTX 1080 Ti OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.33.0 387.10.10.10.40.122
Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-23 20:20, hash:
5a6ab6f594Worked: before :)
Short description of error
Faces of object with multiple materials behave oddly (disappearing entirely or showing wrong material) in viewport except in Cycles.
Exact steps for others to reproduce the error
Use default cube, assign a second material to face(s). Parts with second material disappear.
Add 3rd material to other face, it becomes transparent too.
Assign one of any 3 materials to all faces, everything shows up.
Play assigning material to other faces a few times, it even swaps materials oddly (sometimes transparent sometimes wrong one).
This occurs in Solid, Material Preview and Eevee.
It's working fine in Cycles.
This issue was referenced by
c601839176Added subscribers: @ChuckOcheret, @cschumann
Changed status from 'Open' to: 'Resolved'
System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 580X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20
Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-27 21:15, hash:
1b36c91831Worked: (optional)
Can confirm: issue is resolved.
Thanks!