eevee not showing multi material object properly when blend is loaded until mesh is updated #68826

New Issue

MACHIN3 · 2019-08-19T14:38:03+02:00

MACHIN3 commented

2019-08-19 14:38:03 +02:00

System Information
Operating system: Linux-4.13.10-041310-generic-x86_64-with-debian-stretch-sid 64 Bits
Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.67

Blender Version
Broken: version: 2.81 (sub 2), branch: master, commit date: 2019-08-16 13:02, hash: 078d02f557
Worked: 4074ab361e

Short description of error
I have an object with 3 material slots and a different material on each slot. When the blend is loaded in SOLID shading mode, and you switch to lookdev or rendered mode with eevee being the rendered, the material of the last slot is shown covering the entire mesh, when in reality only a few polygons have that slots material index assigned. If you update the mesh, either by going manually into edit mode, or by running obj.data.update() the material's are updated and shown properly - until the blend is loaded again.

eevee_and_multi_material_objects.blend

Exact steps for others to reproduce the error

load the blend file above
- if you are loading it without UI, make sure you are in SOLID shading
switch to lookdev or rendered shading
- note how the entire object is metallic
go into edit mode
- note how the materials update and all three are now shown on different parts of the model

**System Information** Operating system: Linux-4.13.10-041310-generic-x86_64-with-debian-stretch-sid 64 Bits Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.67 **Blender Version** Broken: version: 2.81 (sub 2), branch: master, commit date: 2019-08-16 13:02, hash: `078d02f557` Worked: `4074ab361e` **Short description of error** I have an object with 3 material slots and a different material on each slot. When the blend is loaded in SOLID shading mode, and you switch to lookdev or rendered mode with eevee being the rendered, the material of the last slot is shown covering the entire mesh, when in reality only a few polygons have that slots material index assigned. If you update the mesh, either by going manually into edit mode, or by running `obj.data.update()` the material's are updated and shown properly - until the blend is loaded again. [eevee_and_multi_material_objects.blend](https://archive.blender.org/developer/F7673043/eevee_and_multi_material_objects.blend) **Exact steps for others to reproduce the error** * load the blend file above - if you are loading it without UI, make sure you are in SOLID shading * switch to lookdev or rendered shading - note how the entire object is metallic * go into edit mode - note how the materials update and all three are now shown on different parts of the model

MACHIN3 commented

2019-08-19 14:38:03 +02:00

Added subscriber: @MACHIN3

blender-admin commented

2019-08-19 14:38:03 +02:00

#68754 was marked as duplicate of this issue

blender-admin commented

2019-08-19 14:38:03 +02:00

#70008 was marked as duplicate of this issue

blender-admin commented

2019-08-19 14:38:03 +02:00

#70058 was marked as duplicate of this issue

blender-admin commented

2019-08-19 14:38:03 +02:00

#69945 was marked as duplicate of this issue

blender-admin commented

2019-08-19 14:38:03 +02:00

#69695 was marked as duplicate of this issue

blender-admin commented

2019-08-19 14:38:03 +02:00

#69329 was marked as duplicate of this issue

blender-admin commented

2019-08-19 14:38:03 +02:00

#69142 was marked as duplicate of this issue

Asher commented

2019-08-19 16:46:23 +02:00

Added subscriber: @ThatAsherGuy

Fin O'Riordan commented

2019-08-21 10:07:36 +02:00

Added subscriber: @FinbarrORiordan

Fin O'Riordan commented

2019-08-21 10:07:36 +02:00

Bug reproduced using the linked .blend:

system-info.txt

Bug reproduced using the linked .blend: [system-info.txt](https://archive.blender.org/developer/F7678520/system-info.txt)

Philipp Oeser commented

2019-08-21 10:25:57 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-08-21 10:25:57 +02:00

Cannot reproduce (f041d2f116), immediate multiple materials here...
system-info.txt

Cannot reproduce (f041d2f116), immediate multiple materials here... [system-info.txt](https://archive.blender.org/developer/F7678702/system-info.txt)

Philipp Oeser commented

2019-08-21 10:27:26 +02:00

Seeing I have a newer driver than both of you: mind checking if upgrading the drivers fixes the problem?

marc dion commented

2019-08-21 10:48:19 +02:00

Added subscriber: @MarcClintDion

marc dion commented

2019-08-21 10:48:19 +02:00

It's confirmed here.

Windows 10
GTX 1070 - driver(430.86)

It's confirmed here. Windows 10 GTX 1070 - driver(430.86) ![Broken material stack.jpg](https://archive.blender.org/developer/F7678925/Broken_material_stack.jpg)

MACHIN3 commented

2019-08-21 10:51:30 +02:00

I have just confirmed it on Windows as well, with newer drivers than yours @lichtwerk

renderer:	'Quadro P4000/PCIe/SSE2'
vendor:		'NVIDIA Corporation'
version:	'4.5.0 NVIDIA 431.02'

system-info.txt

You need to make sure you are loading the scene while in SOLID shading or with the Load UI option enabled.

I have just confirmed it on Windows as well, with newer drivers than yours @lichtwerk ``` renderer: 'Quadro P4000/PCIe/SSE2' vendor: 'NVIDIA Corporation' version: '4.5.0 NVIDIA 431.02' ``` [system-info.txt](https://archive.blender.org/developer/F7678945/system-info.txt) You need to make sure you are loading the scene while in SOLID shading or with the Load UI option enabled.

Clément Foucault was assigned by Philipp Oeser

2019-08-21 11:07:04 +02:00

Philipp Oeser commented

2019-08-21 11:07:04 +02:00

Added subscriber: @fclem

Philipp Oeser commented

2019-08-21 11:07:04 +02:00

Ah, here we go, I can reproduce loading having Load UI ON.
Thx everyone for poking.
[ still cannot reproduce having Load UI OFF -- even though in SOLID, but I guess that is not mandatory for calling this a bug :) ]

Anyways: would kindly ask @fclem to have a look here...

Ah, here we go, I can reproduce loading having `Load UI` ON. Thx everyone for poking. [ still cannot reproduce having `Load UI` OFF -- even though in SOLID, but I guess that is not mandatory for calling this a bug :) ] Anyways: would kindly ask @fclem to have a look here...

blender-admin commented

2019-08-21 15:53:57 +02:00

This issue was referenced by d357e7b065

This issue was referenced by d357e7b0653588d5fb85deec270464778a252406

Clément Foucault commented

2019-08-21 15:55:26 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-08-21 15:55:26 +02:00

blender-admin commented

2019-08-23 20:28:43 +02:00

This issue was referenced by f16a28c4af

This issue was referenced by f16a28c4afbfab86362898c19aa177227c9f47ed

Brecht Van Lommel commented

2019-08-23 20:35:20 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-08-23 20:35:20 +02:00

Changed status from 'Resolved' to: 'Open'

Brecht Van Lommel reopened this issue

2019-08-23 20:35:20 +02:00

Brecht Van Lommel commented

2019-08-23 20:35:20 +02:00

Reverted since this caused various crashes:

#69087 (Error when using vertex color)
#69083 (Blender crashes when switching from solid view to rendered or lookdev mode in eevee.)
#69088 (Assert entering editmode with a UVEditor open)
#69096 (Crash in drawcode in a BI character file.)

Reverted since this caused various crashes: * #69087 (Error when using vertex color) * #69083 (Blender crashes when switching from solid view to rendered or lookdev mode in eevee.) * #69088 (Assert entering editmode with a UVEditor open) * #69096 (Crash in drawcode in a BI character file.)

Philipp Oeser commented

2019-08-26 10:56:26 +02:00

Added subscribers: @item412, @AbidMaqbool

blender-admin commented

2019-08-26 15:18:26 +02:00

This issue was referenced by 742119bcb5

This issue was referenced by 742119bcb50a83b7f8bb6ceefb34861ac54d9cc8

Clément Foucault commented

2019-08-26 15:43:46 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-08-26 15:43:46 +02:00

Philipp Oeser commented

2019-09-02 10:50:56 +02:00

Changed status from 'Resolved' to: 'Open'

Philipp Oeser reopened this issue

2019-09-02 10:50:56 +02:00

Philipp Oeser commented

2019-09-02 10:50:56 +02:00

Have to repopen this, doesnt seem fixed for me (and has been reported again in #69329 (Eevee: Only one material is displayed before enter in Edit mode when mesh has multiple materials))
@fclem: mind checking again?

Have to repopen this, doesnt seem fixed for me (and has been reported again in #69329 (Eevee: Only one material is displayed before enter in Edit mode when mesh has multiple materials)) @fclem: mind checking again?

Philipp Oeser commented

2019-09-02 10:51:50 +02:00

Added subscribers: @MarcinTwarowski, @antoniov

Philipp Oeser commented

2019-09-06 12:42:13 +02:00

@fclem : I have added this to 2.81 milestone (since it was set to "High"), mind checking again?

Philipp Oeser commented

2019-09-10 11:38:33 +02:00

Added subscriber: @NiekKort

Daniel Paul commented

2019-09-11 15:10:33 +02:00

Added subscriber: @DanielPaul

Philipp Oeser commented

2019-09-16 15:08:29 +02:00

Added subscriber: @ME2

Philipp Oeser commented

2019-09-19 10:11:47 +02:00

Added subscribers: @jerrsoundripper, @ideasman42

Jerr Soundripper commented

2019-09-19 10:19:51 +02:00

Edit THE cube, Duplicate it in edit mode, create new material and assign new material to the new one. The second material won't show up in Eevee

Edit THE cube, Duplicate it in edit mode, create new material and assign new material to the new one. The second material won't show up in Eevee ![Capture d’écran 2019-09-19 à 10.18.59.png](https://archive.blender.org/developer/F7757758/Capture_d_e_cran_2019-09-19_a__10.18.59.png)

Michael Soluyanov commented

2019-09-19 15:58:34 +02:00

Added subscriber: @crantisz