Problems with materials nodes in Alpha Trees #100846

New Issue

Stefano Toneatto · 2022-09-06T08:03:43+02:00

Stefano Toneatto commented

2022-09-06 08:03:43 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-09-04 04:25, hash: 0ff920b777
Worked: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-14 18:40, hash: 659b63751d

Loaded materials of the Alpha Trees addon are not correct
When opening an existing file with the Alpha Trees addon loaded and visible, there is a noticeable problem with colours. Maybe it's due to some MixRGB or Hue/Saturation node having a bug.

Exact steps for others to reproduce the error
Add a plane, scatter Alpha Trees, reduce saturation and open with a new version.

untitled.blend

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15 **Blender Version** Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-09-04 04:25, hash: `0ff920b777` Worked: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-14 18:40, hash: 659b63751d63 **Loaded materials of the Alpha Trees addon are not correct** When opening an existing file with the Alpha Trees addon loaded and visible, there is a noticeable problem with colours. Maybe it's due to some MixRGB or Hue/Saturation node having a bug. **Exact steps for others to reproduce the error** Add a plane, scatter Alpha Trees, reduce saturation and open with a new version. ![Working.png](https://archive.blender.org/developer/F13462313/Working.png) ![Not Working.png](https://archive.blender.org/developer/F13462312/Not_Working.png) [untitled.blend](https://archive.blender.org/developer/F13462316/untitled.blend)

Stefano Toneatto commented

2022-09-06 08:03:43 +02:00

Added subscriber: @stefanotoneatto

Pratik Borhade commented

2022-09-06 08:52:03 +02:00

Added subscriber: @PratikPB2123

Charlie Jolly commented

2022-09-06 15:59:44 +02:00

Added subscriber: @CharlieJolly

Germano Cavalcante commented

2022-09-06 17:12:53 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-09-06 17:12:53 +02:00

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

Germano Cavalcante commented

2022-09-06 17:12:53 +02:00

I can confirm the issue.

bfa0ee13d5 is the first "bad" commit.

But the file is too complex and too time consuming for us to track down (and determine if it's really a bug or a temporary indeterminate behavior).

We require the bug reporter to narrow down the problem.

Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

I can confirm the issue. bfa0ee13d5 is the first "bad" commit. But the file is too complex and too time consuming for us to track down (and determine if it's really a bug or a temporary indeterminate behavior). We require the bug reporter to narrow down the problem. Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

Charlie Jolly commented

2022-09-06 17:44:58 +02:00

Original bug report file opens in both 3.2 and 3.4 alpha with red undefined node in montagne material

This file created in 3.2 opens fine in 3.4 alpha
node_mix_bug.blend

As @mano-wii stated it is difficult to track down the issue in the original bug report file.

It seems related to the new Mix Node but it's unclear where or how the bug has happened.

Saving a 3.4 file with the new node will not be forward compatible with 3.2.

3.4 is in alpha so please be careful with any important or production files.

Original bug report file opens in both 3.2 and 3.4 alpha with red undefined node in montagne material ![image.png](https://archive.blender.org/developer/F13463074/image.png) This file created in 3.2 opens fine in 3.4 alpha [node_mix_bug.blend](https://archive.blender.org/developer/F13463071/node_mix_bug.blend) As @mano-wii stated it is difficult to track down the issue in the original bug report file. It seems related to the new Mix Node but it's unclear where or how the bug has happened. Saving a 3.4 file with the new node will not be forward compatible with 3.2. 3.4 is in alpha so please be careful with any important or production files.

Pratik Borhade commented

2022-09-17 04:27:54 +02:00

@stefanotoneatto, Any updates?

Stefano Toneatto commented

2022-09-17 07:03:26 +02:00

No, the problem is still in 3.4.0-alpha+master.e108d67635a0-windows.amd64-release.

Pratik Borhade commented

2022-09-17 07:17:23 +02:00

@stefanotoneatto yes, it's still replicable. But as Germano said, we need reporter to simplify the file.
At the moment its quite difficult to investigate with larger node-tree

In #100846#1413117, @mano-wii wrote:
But the file is too complex and too time consuming for us to track down (and determine if it's really a bug or a temporary indeterminate behavior).
We require the bug reporter to narrow down the problem.
Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

@stefanotoneatto yes, it's still replicable. But as Germano said, we need reporter to simplify the file. At the moment its quite difficult to investigate with larger node-tree > In #100846#1413117, @mano-wii wrote: > But the file is too complex and too time consuming for us to track down (and determine if it's really a bug or a temporary indeterminate behavior). > We require the bug reporter to narrow down the problem. > Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

blender-admin commented

2022-09-22 18:08:00 +02:00

This issue was referenced by 680fa8a523

This issue was referenced by 680fa8a523e0df2181305a1d2abfb52011510f59

Charlie Jolly commented

2022-09-22 18:09:47 +02:00

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

Charlie Jolly closed this issue

2022-09-22 18:09:47 +02:00

Charlie Jolly self-assigned this 2022-09-22 18:09:47 +02:00

Charlie Jolly commented

2022-09-22 18:31:05 +02:00

@stefanotoneatto this report was closed automatically by the commit for forward compatibility -- see 680fa8a523

The patch will not fix files that are opened and saved in older versions of Blender.

@stefanotoneatto this report was closed automatically by the commit for forward compatibility -- see 680fa8a523 The patch will not fix files that are opened and saved in older versions of Blender.

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Problems with materials nodes in Alpha Trees #100846