A Godot editor addon to batch-modify material assets.
Compatible with Godot 4 (Godot 3.5 version available in seperate branch)
You can set the most common material properties using the inspector in the top half.
Alternatively you can change any property in the text field in this format:
roughness=0
albedo_color=478cc0
albedo_texture=res://icon.png
emission_enabled=true
uv1_offset=1, 1, 1