decimate.py for blender. used for infinigen project to reduce huge file size - adjust ratio and minimum as needed - I think I used different values - I forget

gistfile1.txt

import bpy

# 1. Purge unused data (materials, textures, meshes)
bpy.ops.outliner.orphans_purge(do_local_ids=True, do_linked_ids=True, do_recursive=True)

# 2. Apply Decimate Modifier to all selected objects with high-polygon meshes
def apply_decimate(threshold=10, ratio=0.0001):
    # Loop through all mesh objects in the scene
    for obj in bpy.data.objects:
        if obj.type == 'MESH':
            # Only decimate objects with more than the threshold number of vertices
            if len(obj.data.vertices) > threshold:
                decimate_mod = obj.modifiers.new(name="Decimate", type='DECIMATE')
                decimate_mod.ratio = ratio
                bpy.context.view_layer.objects.active = obj
                bpy.ops.object.modifier_apply(modifier="Decimate")

# Apply decimation to objects with more than 10,000 vertices, reducing to 50%
apply_decimate(threshold=1000decimate, ratio=0.05)

# 3. Reduce texture size
def reduce_texture_size(max_resolution=1024):
    for image in bpy.data.images:
        if image.size[0] > max_resolution or image.size[1] > max_resolution:
            image.scale(max_resolution, max_resolution)
            print(f"Resized texture: {image.name} to {max_resolution}x{max_resolution}")

# Reduce texture size to 1024x1024
reduce_texture_size(max_resolution=1024)

# 4. Remove duplicate materials by consolidating them
def remove_duplicate_materials():
    materials = bpy.data.materials
    material_names = {}
    
    for mat in materials:
        if mat.name in material_names:
            # Replace users of this material with the existing one
            mat.user_clear()
            materials.remove(mat)
        else:
            material_names[mat.name] = mat

# Consolidate duplicate materials
remove_duplicate_materials()

# 5. Enable compression when saving the file
bpy.context.preferences.filepaths.use_file_compression = True

# 6. Save the file as a compressed .blend file
blend_filepath = bpy.data.filepath  # Current file path
if blend_filepath:
    bpy.ops.wm.save_as_mainfile(filepath=blend_filepath, compress=True)
    print(f"File saved and compressed: {blend_filepath}")
else:
    print("No file path found. Please save the file manually after running the script.")