Mix nodes are broken when opening a file from 3.4 in 3.3 #103462

New Issue

Adolfo · 2022-12-25T05:33:41+01:00

Adolfo commented

2022-12-25 05:33:41 +01:00

System Information
Operating system: Windows 10
Graphics card: RTX 2070 Super

Blender Version
Broken: 3.4 (it breaks the file)
Worked: 3.3

I've been having a miserable time with Blender ever since version 3.4 came out. Version 3.4 is crashing all time, as I described in this post here: https://developer.blender.org/T103461

And I can't roll back my files because ever since this update came out, every single mix node that I try to open on the former version is broken (showing if red as an empty node). So I can't work on version 3.4, and I can't go back to 3.3. Needing to rely on an old backup, I had to keep my project rolling. Since I, unfortunately, noticed the crash only weeks after updating to 3.4.

Exact steps for others to reproduce the error
1 - Have any material using mix colour or any other node that mixes things, save it in Blender 3.3
2 - Open the file in 3.4, and save it.
3- Try to open it in 3.3. The nodes inside the materials will be broken.

**System Information** Operating system: Windows 10 Graphics card: RTX 2070 Super **Blender Version** Broken: 3.4 (it breaks the file) Worked: 3.3 I've been having a miserable time with Blender ever since version 3.4 came out. Version 3.4 is crashing all time, as I described in this post here: https://developer.blender.org/T103461 And I can't roll back my files because ever since this update came out, every single mix node that I try to open on the former version is broken (showing if red as an empty node). So I can't work on version 3.4, and I can't go back to 3.3. Needing to rely on an old backup, I had to keep my project rolling. Since I, unfortunately, noticed the crash only weeks after updating to 3.4. **Exact steps for others to reproduce the error** 1 - Have any material using mix colour or any other node that mixes things, save it in Blender 3.3 2 - Open the file in 3.4, and save it. 3- Try to open it in 3.3. The nodes inside the materials will be broken.

Adolfo commented

2022-12-25 05:33:41 +01:00

Added subscriber: @Corintio

Adolfo commented

2022-12-25 05:36:03 +01:00

The comment by Miguel Pozo here has a screenshot of exactly how the broken nodes look like when we try to open a 3.4 file in 3.3
https://developer.blender.org/T102965

The comment by Miguel Pozo here has a screenshot of exactly how the broken nodes look like when we try to open a 3.4 file in 3.3 https://developer.blender.org/T102965

fwfeet commented

2022-12-25 10:46:52 +01:00

Added subscriber: @costa

fwfeet commented

2022-12-25 10:46:52 +01:00

It is a known thing, and cant be considered a bug since you open files from a newer version in an older one...

Iliya Katushenock commented

2022-12-25 11:08:06 +01:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2022-12-25 11:08:06 +01:00

Hello. Just replace the red nodes with new nodes. It's not a bug, it's just a developer's choice... So yeah, it doesn't need to be fixed.

Pratik Borhade commented

2022-12-25 11:13:09 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-12-25 11:13:09 +01:00

Changed status from 'Needs Triage' to: 'Archived'

Pratik Borhade closed this issue

2022-12-25 11:13:09 +01:00

Pratik Borhade commented

2022-12-25 11:13:09 +01:00

Hi, this is not a bug. Please check release notes: https://wiki.blender.org/wiki/Reference/Release_Notes/3.4#Compatibility

The "MixRGB" node for Shader and Geometry Nodes is converted to the new "Mix Node" on loading. Files saved with the new node are not forward compatible with older
versions of Blender.

Hi, this is not a bug. Please check release notes: https://wiki.blender.org/wiki/Reference/Release_Notes/3.4#Compatibility > The "MixRGB" node for Shader and Geometry Nodes is converted to the new "Mix Node" on loading. Files saved with the new node are not forward compatible with older > versions of Blender.

Chipp Walters commented

2023-01-19 05:56:41 +01:00

Added subscriber: @chippwalters

Chipp Walters commented

2023-01-19 05:56:41 +01:00

Wow! That is huge. What is the reason for doing something like this? Does this mean you can't save materials in Asset Browser and expect them to work in versions lower than 3.4?

Be nice if someone would write an addon that would auto-replace all the non-defined nodes with the proper mix node.

Wow! That is huge. What is the reason for doing something like this? Does this mean you can't save materials in Asset Browser and expect them to work in versions lower than 3.4? Be nice if someone would write an addon that would auto-replace all the non-defined nodes with the proper mix node.

Thomas Dinges added this to the 3.4 milestone 2023-02-07 19:01:33 +01:00

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Mix nodes are broken when opening a file from 3.4 in 3.3 #103462