Discrepancy Between Manual and API-based 'Smooth by Angle' Results

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[ubuntu 22.04 | blender 4.4.1]
Hi, I’m using the Python API to enable Auto Smooth and set the angle to 15 degrees on all mesh objects. However, the shading result looks different from when I do it manually in the UI — manually it looks smooth, but via script, it’s still faceted.

Here’s the code I used:

import bpy

def apply_smooth_by_angle_to_all_meshes():
    for obj in bpy.data.objects:
        if obj.type != 'MESH':
            continue

        bpy.context.view_layer.objects.active = obj
        obj.select_set(True)

        bpy.ops.object.shade_auto_smooth()

        if "Smooth by Angle" in obj.modifiers:
            modifier = obj.modifiers["Smooth by Angle"]
            modifier["Input_1"] = 0.261799  # 15 degrees
            modifier["Socket_1"] = True

        obj.select_set(False)

    bpy.context.view_layer.update()
    for area in bpy.context.screen.areas:
        if area.type == 'VIEW_3D':
            area.tag_redraw()

apply_smooth_by_angle_to_all_meshes()
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This is without the modifier:

image
image784×494 43.2 KB

3

This is manually add the modifier:

image
image784×494 50.5 KB

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This is with code to add modifier:

image
image784×494 40.9 KB

5

#127249 - Missing update tags for geometry node input IDProperties - blender - Blender Projects ?