blender_blocky.txt

# Blender script to make textures look blocky.
# Author: Ohanno_Forgotten-Knight
#
# See instructions, end of step #9, for how to run this script:
# http://www.realtimerendering.com/erich/minecraft/public/mineways/mineways.html#blender
#
# Blender documentation is here: https://docs.blender.org/api/current/bpy.types.ShaderNodeTexImage.html

import bpy

for mat in bpy.data.materials:
    if not mat.node_tree:
        continue
    for node in mat.node_tree.nodes:
        if node.type == 'TEX_IMAGE':
            node.interpolation = 'Closest'