Needs updateing for 5.0

[7yy4vpmvg5-ui]

Describe the bug
Needs updateing for 5.0

To Reproduce
Steps to reproduce the behavior:

1. use the 5.0 release candidate.
2. install the addon
3. try and import a .3dm file
4. See error

Expected behavior
Import the 3dm file like in blender v4.5

Desktop

• OS: windows 11
• Blender 5.0.0 [release candidate]

Additional context
Error in Info log from my last attempt:

Python: Traceback (most recent call last):
File "C:\Users\thomas\AppData\Roaming\Blender Foundation\Blender\5.0\extensions\user_default\import_3dm_init_.py", line 201, in execute
return read_3dm(context, options)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\thomas\AppData\Roaming\Blender Foundation\Blender\5.0\extensions\user_default\import_3dm\read3dm.py", line 121, in read_3dm
converters.handle_materials(context, model, materials, update_materials)
File "C:\Users\thomas\AppData\Roaming\Blender Foundation\Blender\5.0\extensions\user_default\import_3dm\converters\material.py", line 509, in handle_materials
default_material(blmat)
File "C:\Users\thomas\AppData\Roaming\Blender Foundation\Blender\5.0\extensions\user_default\import_3dm\converters\material.py", line 277, in default_material
plaster = PlasterWrapper(blender_material)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\thomas\AppData\Roaming\Blender Foundation\Blender\5.0\extensions\user_default\import_3dm\converters\material.py", line 202, in init
super(PlasterWrapper, self).init(material, is_readonly=False, use_nodes=True)
TypeError: ShaderWrapper.init() got an unexpected keyword argument 'use_nodes'

[dimitarsp]

I can confirm this as well

[alessandro-zomparelli]

Hey guys, thank for reporting that. I will look into that. I will work on some fixes to make sure that Tissue is still compatible with Blender 5.
Cheers

[tadavis42]

Blender 5.0 Compatibility Error: ShaderWrapper use_nodes parameter

Error:
TypeError: ShaderWrapper.init() got an unexpected keyword argument 'use_nodes'

Location: converters/material.py:202 in the PlasterWrapper.init() method

Cause:
Blender 5.0 removed the use_nodes parameter from ShaderWrapper.init(). This was a breaking API change from previous versions.

Fix:
Change line 202 from:
super(PlasterWrapper, self).init(material, is_readonly=False, use_nodes=True)

To:
super(PlasterWrapper, self).init(material, is_readonly=False)
self.material.use_nodes = True

Instead of passing use_nodes as a parameter, set it directly on the material object after initialization.

[haroldmiller2004-cmyk]

I tried that. I didn't work.

[boikyeet]

I tried this fix but it gave me the following error when trying to import

Blender 5.0 Compatibility Error: ShaderWrapper use_nodes parameter

Error: TypeError: ShaderWrapper.init() got an unexpected keyword argument 'use_nodes'

Location: converters/material.py:202 in the PlasterWrapper.init() method

Cause: Blender 5.0 removed the use_nodes parameter from ShaderWrapper.init(). This was a breaking API change from previous versions.

Fix: Change line 202 from: super(PlasterWrapper, self).init(material, is_readonly=False, use_nodes=True)

To: super(PlasterWrapper, self).init(material, is_readonly=False) self.material.use_nodes = True

Instead of passing use_nodes as a parameter, set it directly on the material object after initialization.

[tadavis42]

Blender 5.0 Fix for import_3dm Add-on

Problem

The import_3dm add-on fails in Blender 5.0 with the following error:

TypeError: ShaderWrapper.__init__() got an unexpected keyword argument 'use_nodes'

Root Cause

Blender 5.0 removed the use_nodes parameter from the ShaderWrapper.__init__() method. The add-on was passing this parameter during initialization, causing the error.

Solution

In the file converters/material.py, modify the PlasterWrapper.__init__() method:

Before (Blender 4.x):

class PlasterWrapper(ShaderWrapper):
    # ... other code ...

    def __init__(self, material):
        super(PlasterWrapper, self).__init__(material, is_readonly=False, use_nodes=True)

After (Blender 5.0):

class PlasterWrapper(ShaderWrapper):
    # ... other code ...

    def __init__(self, material):
        super(PlasterWrapper, self).__init__(material, is_readonly=False)
        self.material.use_nodes = True

What Changed

• Removed the use_nodes=True parameter from the super().__init__() call
• Added self.material.use_nodes = True as a separate line after initialization

This sets the use_nodes property directly on the material object after initialization, instead of passing it as a parameter.

File Location

The file to modify is:

<your_blender_install>/extensions/user_default/import_3dm/converters/material.py

Specifically, line 201-203 in the PlasterWrapper class __init__ method.

Tested With

• Blender 5.0
• import_3dm add-on (master branch from October 2025)

Related GitHub Issue

#153

blender_5_0_import_3dm.patch

[boikyeet]

This one does the trick, thank you @tadavis42