Any way to prevent "Backface Culling" checkbox from being enabled every time I startup Blender? (version 3.2)

Question

To preface, I am still new to Blender, and not knowledgeable with scripting; so, if you offer a script to use, please tell me which method to use to run it (saving as a .py file, or running it as a script within Blender, etc).

I use Blender only to create mods for American Truck Simulator/Euro Truck Simulator 2, and I hate having to select each material individually and uncheck the "Backface Culling" box every time I start up Blender or open a project file. I prefer to not see through solid objects in my workflow (unless it's a transparent object like glass).

I've searched on how to do this and found nothing relatable or pertinent. There was one post where someone offered a script to run, which I've tried, but that did nothing.

I was running version 2.8 last month and found that it would remember keeping "Backface Culling" disabled every time I created a new mesh, start up Blender, or even load a file, unless there was an option I selected but can't remember now.

Surely, there must be an option buried somewhere (or vaguely listed) to allow this.

Answer 1

Change show_transparent_back to use_backface_culling:

import bpy

for eachMat in bpy.data.materials:
    
    eachMat.use_backface_culling = False

You can also use operator template

bl_info = {
    "name": "Set Backface culling",
    "author": "Your Name Here",
    "version": (1, 0),
    "blender": (2, 80, 0),
    "location": "F3",
    "description": "Set Backface culling to false in all materials",
    "warning": "",
    "doc_url": "",
    "category": "Object",
}



import bpy


def main(context):
    for eachMat in bpy.data.materials:
        eachMat.use_backface_culling = False


class SimpleOperator(bpy.types.Operator):
    """Set Backface culling to false in all materials"""
    bl_idname = "object.set_backface"
    bl_label = "Set Backface culling to false in all materials"

    @classmethod
    def poll(cls, context):
        return context.active_object is not None

    def execute(self, context):
        main(context)
        return {'FINISHED'}


def register():
    bpy.utils.register_class(SimpleOperator)


def unregister():
    bpy.utils.unregister_class(SimpleOperator)



if __name__ == "__main__":
    register()

Then install this file as an addon add it to quick favorites using F3:

And you will have it in one click in Q menu: