Skinpy Extended

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A Python library for Minecraft skins, focusing on high-fidelity rendering, texture reconstruction, and bi-directional mapping.

Motivation

This project is a fork and extension of the archived skinpy library. We aim to revitalize the project with advanced features inspired by modern high-performance renderers like nmsr-rs.

Our core goal is to provide a simple, Pythonic way to bridge the gap between 2D skin textures and 3D renders, enabling seamless mapping in both directions.

AI Dataset Preparation

Modern AI models require high-quality, structured data. By providing bi-directional mapping between 2D textures and 3D renders, Skinpy Extended acts as a powerful tool for dataset preparation in the field of skin generation and processing.

• Automated Dataset Generation: Efficiently create thousands of consistent perspective renders from raw skin textures to feed into training pipelines for GANs, Diffusion models, or Vision Transformers.
• Bi-directional Ground Truth: Leverage the ability to reconstruct textures from renders to validate model performance and calculate loss between generated renders and original textures.
• Structured Mapping: Streamlining the process of preparing datasets that help models understand Minecraft's unique texture-to-model mapping, enabling high-fidelity regeneration based on AI-processed outputs.

Features

• 2D to 3D Mapping: Render high-quality isometric views of any Minecraft skin.
• 3D to 2D Reconstruction: Reconstruct original 64x64 skin textures from rendered images.
• Granular Control: Access and modify pixels at the skin, body part, or individual face level using 3D coordinates.
• Dataset Preparation: Perfect for generating large-scale, consistent datasets of skin renders and their corresponding textures.
• CLI & API: Use the built-in command-line tool or integrate the flexible Python API into your own projects.

Installation

pip install skinpy-extended

Quickstart

Loading and Saving

from skinpy import Skin

# Load a skin from a file
skin = Skin.from_path("steve.png")

# Save the skin texture back to a file
skin.to_image().save("steve_copy.png")

Rendering a Perspective View

from skinpy import Skin, Perspective

skin = Skin.from_path("steve.png")

# Create a perspective (Front-Right-Up)
perspective = Perspective.new(
    x="right",
    y="front",
    z="up",
    scaling_factor=20
)

# Render and save
skin.to_isometric_image(perspective).save("render.png")

Reconstructing a Skin from a Render

from PIL import Image
from skinpy import Skin

# Load a combined render (e.g. front and back views)
render_img = Image.open("render.png").convert("RGBA")

# Map the render back to a 3D Skin object
skin = Skin.from_combined_render(render_img, scale=20)

# Extract the original 2D texture
skin.to_image().save("reconstructed.png")

Coordinate System

Skinpy uses a coordinate system with the origin at the left-down-front of the skin from the perspective of an observer looking at the skin.

Development & Contributing

We welcome contributions to expand the library's capabilities! Areas of interest include:

• Support for Slim (Alex-style) models.
• Support for secondary layers (overlays/hats).
• Improved rendering performance.

Feel free to open issues or submit pull requests.

Credits

• Originally created by Tim Martin and Steven Van Ingelgem.
• Maintained and extended by Bonenk.
• Logic inspired by nmsr-rs.

License

MIT