Smooth By Angle (Node Group 4.1) Does not work in older Blenders! #118118

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opened 2024-02-12 04:49:30 +01:00 by Andrea Donati · 7 comments

Andrea Donati commented

2024-02-12 04:49:30 +01:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 528.49

Blender Version
Broken: version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-02-08 19:55, hash: 2e6223d90f3f
Worked: (newest version of Blender that worked as expected)

Short description of error
The group node created for Blender 4.1 named "Smooth by angle" if applied to an object in Blender 4.1, once the scene has been saved and opened in Blender 4.0 or earlier, the object is completely "Smooth" without taking into account the angles set . This completely breaks backwards compatibility.

I don't know what this is about, but I assume it should be compatible, as the nodes are the same ones that also exist in Blender 4.0 and earlier.

Basically "Smooth By Angle" is completely ignored before Blender 4.1.

Exact steps for others to reproduce the error

Open Blender 4.1.
Apply Shade Smooth to mesh object (bpy.ops.object.shade_smooth(keep_sharp_edges=True)).
Create Geonodes Modifiers and add the "Smooth by angle" node and connect it.
Save Blender Project and open into Blender 4.0 or previous.

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 528.49 **Blender Version** Broken: version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-02-08 19:55, hash: `2e6223d90f3f` Worked: (newest version of Blender that worked as expected) **Short description of error** The group node created for Blender 4.1 named "Smooth by angle" if applied to an object in Blender 4.1, once the scene has been saved and opened in Blender 4.0 or earlier, the object is completely "Smooth" without taking into account the angles set . This completely breaks backwards compatibility. I don't know what this is about, but I assume it should be compatible, as the nodes are the same ones that also exist in Blender 4.0 and earlier. Basically "Smooth By Angle" is completely ignored before Blender 4.1. **Exact steps for others to reproduce the error** 1. Open Blender 4.1. 2. Apply Shade Smooth to mesh object (bpy.ops.object.shade_smooth(keep_sharp_edges=True)). 3. Create Geonodes Modifiers and add the "Smooth by angle" node and connect it. 4. Save Blender Project and open into Blender 4.0 or previous.

Andrea Donati added the

labels 2024-02-12 04:49:31 +01:00

Iliya Katushenock added the

labels 2024-02-12 09:26:16 +01:00

Iliya Katushenock added

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labels 2024-02-12 09:28:49 +01:00

Iliya Katushenock commented

2024-02-12 09:29:07 +01:00

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@HooglyBoogly /

@HooglyBoogly /

Philipp Oeser commented

2024-02-12 09:45:18 +01:00

Member

Dont think 89e3ba4e25 is meant to be backwards compatible, is it?

https://developer.blender.org/docs/release_notes/4.1/nodes_physics/#auto-smooth
https://developer.blender.org/docs/release_notes/4.1/modeling/#auto-smooth

Dont think 89e3ba4e25c9ff921b2584c294cbc38c3d344c34 is meant to be backwards compatible, is it? https://developer.blender.org/docs/release_notes/4.1/nodes_physics/#auto-smooth https://developer.blender.org/docs/release_notes/4.1/modeling/#auto-smooth

Iliya Katushenock commented

2024-02-12 09:53:09 +01:00

Member

@lichtwerk I don't see any limitation for backwards compatible in release notes. But maybe Hans would clarify its in this case.

@lichtwerk I don't see any limitation for backwards compatible in release notes. But maybe Hans would clarify its in this case.

Pratik Borhade referenced this issue

2024-02-12 09:58:51 +01:00

Workflow Regression: Autosmooth 4.1 #116922

Gerstmann Bradley commented

2024-02-12 10:32:02 +01:00

If I unserstand it correctly, this report is adding modifier in 4.1 and open the file in 4.0. Shouldn't it be called a forward compatibility instead?

Although not sure why it happens between 4.1 and 4.0. but ideally only 3.6 is maintained for such a function I assume.

If I unserstand it correctly, this report is adding modifier in 4.1 and open the file in 4.0. Shouldn't it be called a forward compatibility instead? Although not sure why it happens between 4.1 and 4.0. but ideally only 3.6 is maintained for such a function I assume.

Andrea Donati commented

2024-02-12 11:39:56 +01:00

Author

If I unserstand it correctly, this report is adding modifier in 4.1 and open the file in 4.0. Shouldn't it be called a forward compatibility instead?

Although not sure why it happens between 4.1 and 4.0. but ideally only 3.6 is maintained for such a function I assume.

Analyzing the situation specifically, Same Geometry nodes Setup produce 2 different situation into 2 different Blender version

I don't understand what it depends on, some "projects.blend" could already be made with the Geo Nodes mentioned above, into Blender 4.0 and then move to Blender 4.1 already with this Geonode modifier, but this makes the same logic incompatible from 4.0 to 4.1,
I think it's not about backwards compatibility only

> If I unserstand it correctly, this report is adding modifier in 4.1 and open the file in 4.0. Shouldn't it be called a forward compatibility instead? > > Although not sure why it happens between 4.1 and 4.0. but ideally only 3.6 is maintained for such a function I assume. Analyzing the situation specifically, Same Geometry nodes Setup produce 2 different situation into 2 different Blender version I don't understand what it depends on, some "projects.blend" could already be made with the Geo Nodes mentioned above, into Blender 4.0 and then move to Blender 4.1 already with this Geonode modifier, but this makes the same logic incompatible from 4.0 to 4.1, I think it's not about backwards compatibility only

Hans Goudey commented

2024-02-12 13:46:39 +01:00

Member

This is not a bug. Auto smooth must be enabled in 4.0 for this to work. Generally some new feature not working in an older version isn't a bug anyway.

This is not a bug. Auto smooth must be enabled in 4.0 for this to work. Generally some new feature not working in an older version isn't a bug anyway.

Hans Goudey closed this issue

2024-02-12 13:46:43 +01:00

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labels 2024-02-12 13:46:45 +01:00

Andrea Donati reopened this issue

2024-02-13 00:14:50 +01:00

Blender Bot added

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labels 2024-02-13 00:14:53 +01:00

Andrea Donati closed this issue

2024-02-13 00:15:11 +01:00

Blender Bot added

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labels 2024-02-13 00:16:11 +01:00

Andrea Donati commented

2024-02-13 00:18:22 +01:00

Author

This is not a bug. Auto smooth must be enabled in 4.0 for this to work. Generally some new feature not working in an older version isn't a bug anyway.

In fact I'm not insisting that it's a bug, but a big problem many people out there could big problem their project by going from 4.0 to 4.1 and then to 4.0, this should be made clear (Or I missed this note, in in this case I apologize) 😅

> This is not a bug. Auto smooth must be enabled in 4.0 for this to work. Generally some new feature not working in an older version isn't a bug anyway. In fact I'm not insisting that it's a bug, but a big problem many people out there could big problem their project by going from 4.0 to 4.1 and then to 4.0, this should be made clear (Or I missed this note, in in this case I apologize) 😅

ValyArhal referenced this issue

2024-03-07 15:10:20 +01:00

4.1 beta shade smooth geonode ingores all edge mark sharp both from manual marking or modifiers #119133

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