# Blender script to make textures use Alpha Hashed for their blend and shadow modes.
# Currently does this to all materials - those that are opaque don't need it, but shouldn't be harmed by doing so.
# Author: StandingPad
#
# See instructions, end of step #9, for how to run this script:
# http://www.realtimerendering.com/erich/minecraft/public/mineways/mineways.html#blender
#
# Some relevant Blender API documentation is here, in case you want to fiddle with it:
# https://docs.blender.org/api/current/bpy.types.ShaderNodeTexImage.html
# https://docs.blender.org/api/current/bpy.types.Material.html

import bpy

for mat in bpy.data.materials:
    """If material has nodetree"""
    if mat.node_tree:
        for node in mat.node_tree.nodes:
            if node.type == 'BSDF_PRINCIPLED':
                alphasocket = node.inputs["Alpha"]
                if alphasocket.is_linked:
                    mat.blend_method = 'HASHED'
                    mat.shadow_method = 'HASHED'