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Sprite Generator
A from-scratch discrete-latent sprite generator using VQ-VAE + conditional transformer, compared against SD-LoRA fine-tuning. Trained entirely on free-tier compute.
Architecture
- VQ-VAE: Encodes sprite images into discrete latent codes (256-512 codebook)
- Transformer Prior: Small GPT-style model over VQ-VAE token sequences conditioned on character class, action, and direction
- Post-processing: Native grid-alignment and palette-constrained output
Stack
- PyTorch for model training
- Kaggle (T4/P100 16GB) for GPU training
- HuggingFace Datasets for data versioning
- HuggingFace Spaces for demo hosting
- GitHub Actions for CI/CD pipeline
Project Structure
sprite-gen/
data/
raw/ # Source sprite packs (gitignored)
scripts/ # Data pipeline: scrape, clean, caption, push
models/
vqvae/ # VQ-VAE encoder/decoder + training
transformer/ # Conditional transformer prior + training
kaggle/ # Kaggle training kernel
demo/ # Gradio app for HF Spaces
eval/ # Metrics and sample generation
.github/workflows/ # CI/CD automation
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