README.md

metadata

title: DVD Image
emoji: 🧊
colorFrom: blue
colorTo: green
sdk: gradio
sdk_version: 5.34.2
app_file: app_dvd_image_trellis_style.py
pinned: false
license: mit
models:
  - Zhengrui/dvd

DVD: Discrete Voxel Diffusion for 3D Generation and Editing

TL;DR: A discrete diffusion based pipeline for generating, assessing and editing voxels, without thresholding artifacts.

DVD provides a integrated pipeline for generating, assessing and editing the sparse voxels. The generated voxels can be used as anchors for SLAT 3D generation pipelines. The pipeline is intentionally split into two stages:

• DVD generates or edits a pure 64^3 voxel grid.
• We leverage TRELLIS stage 2 to produce the final 3D asset formats, including mesh and 3D Gaussian outputs.

This repository supports image-conditioned generation, text-conditioned generation, image-conditioned voxel editing, text-conditioned voxel editing, command-line examples, Python APIs, and local Gradio demos.

🛠️ Installation

Install dependencies required by TRELLIS.

Install pytorch3d.

For the default fast path used by the examples:

export SPCONV_ALGO=native
export ATTN_BACKEND=flash_attn

📦 Pretrained Models

Download the DVD checkpoints and place them under ckpts/, or load them from a Hugging Face model repository with from_pretrained.

Model	Link	Expected files
DVD image generation	https://huggingface.co/Zhengrui/dvd	dvd_img.json, dvd_img.safetensors
DVD image editing	https://huggingface.co/Zhengrui/dvd	dvd_img_BSP_ft.json, dvd_img_BSP_ft.safetensors
DVD text generation	https://huggingface.co/Zhengrui/dvd	dvd_text.json, dvd_text.safetensors
DVD text editing	https://huggingface.co/Zhengrui/dvd	dvd_text_BSP_ft.json, dvd_text_BSP_ft.safetensors
TRELLIS image stage 2	https://huggingface.co/microsoft/TRELLIS-image-large	loaded by TrellisImageTo3DPipeline
TRELLIS text stage 2	https://huggingface.co/microsoft/TRELLIS-text-large	loaded by TrellisTextTo3DPipeline

The DVD pipelines expect the default filenames above.

🚀 Quick Start

Python API

from PIL import Image
from dvd import (
    DVDImageToVoxelPipeline,
    TrellisImageTo3DPipeline,
    export_cubified_voxels,
    run_image_stage2_from_dvd_voxels,
)
from trellis.utils import postprocessing_utils

image = Image.open("assets/example_image/T.png")

# If you have the weights locally
# dvd = DVDImageToVoxelPipeline.from_files(
#     "ckpts/dvd_img.json",
#     "ckpts/dvd_img.safetensors",
#     device="cuda",
# )

# Or load with from_pretrained
dvd = DVDImageToVoxelPipeline.from_pretrained('Zhengrui/dvd', variant="base", device="cuda")

voxels = dvd.sample_voxels(image, seed=42, steps=256)

export_cubified_voxels(voxels, "example_results/T_dvd_voxels.glb")

trellis = TrellisImageTo3DPipeline.from_pretrained("microsoft/TRELLIS-image-large")
trellis.cuda()
outputs = run_image_stage2_from_dvd_voxels(trellis, image, voxels, seed=42)

glb = postprocessing_utils.to_glb(outputs["gaussian"][0], outputs["mesh"][0])
glb.export("example_results/T.glb")

For Hugging Face loading:

from dvd import DVDImageToVoxelPipeline, DVDTextToVoxelPipeline

repo_id = "Zhengrui/dvd"

image_dvd = DVDImageToVoxelPipeline.from_pretrained(repo_id, variant="base", device="cuda")
image_edit_dvd = DVDImageToVoxelPipeline.from_pretrained(repo_id, variant="bsp", device="cuda")

text_dvd = DVDTextToVoxelPipeline.from_pretrained(repo_id, variant="base", device="cuda")
text_edit_dvd = DVDTextToVoxelPipeline.from_pretrained(repo_id, variant="bsp", device="cuda")

Command-Line Examples

Image-conditioned generation:

python examples_dvd_image_generation_api.py \
  --image assets/example_image/T.png \
  --dvd-config ckpts/dvd_img.json \
  --dvd-checkpoint ckpts/dvd_img.safetensors \
  --output-dir example_results

Text-conditioned generation:

python examples_dvd_text_generation_api.py \
  --prompt "A small helper robot with a round body, sky-blue paint, screen face, and tiny tool arms." \
  --name robot \
  --dvd-config ckpts/dvd_text.json \
  --dvd-checkpoint ckpts/dvd_text.safetensors \
  --output-dir example_results

For editing, we provide a minima example in example_edit.ipynb. We recommend to launch apps for straightforward editing, check Gradio Demos.

Image-conditioned editing:

python examples_dvd_image_editing_api.py \
  --target-image assets/example_image_edit/flower_rm.png \
  --voxel-coords assets/example_voxel_edit/voxel64_typical_building_mushroom_dis.npy \
  --dvd-config ckpts/dvd_img_BSP_ft.json \
  --dvd-checkpoint ckpts/dvd_img_BSP_ft.safetensors \
  --output-dir example_results

Text-conditioned editing:

python examples_dvd_text_editing_api.py \
  --prompt "A mushroom house with a large wizard hat roof." \
  --voxel-coords assets/example_voxel_edit/voxel64_typical_building_mushroom_dis.npy \
  --dvd-config ckpts/dvd_text_BSP_ft.json \
  --dvd-checkpoint ckpts/dvd_text_BSP_ft.safetensors \
  --output-dir example_results \
  --edit-y 28 64 \
  --edit-z 0 64

Add --skip-stage2 in the text examples if you only want to save the DVD voxel .npy and cubified voxel .glb.

Gradio Demos

Image generation and editing:

python app_dvd_image.py 

Text generation and editing:

python app_dvd_text.py 

For Hugging Face Spaces or local from_pretrained loading, set:

export DVD_MODEL_REPO=Zhengrui/dvd

❗ Voxel Convention

DVD stores and saves voxels in DVD convention:

samples: [B, D, H, W]
coords:  [N, 4] as [batch, x, y, z]

Saved .npy coordinate files omit the batch dimension and can be loaded back with as_voxel_output(coords, resolution=64). The helper run_image_stage2_from_dvd_voxels and run_text_stage2_from_dvd_voxels convert DVD voxel coordinates to TRELLIS coordinates internally.

⚖️ Acknowledgements and Third-party Licenses

This project builds heavily on TRELLIS and DUO. We sincerely thank the authors of TRELLIS and DUO for releasing their excellent research and code.

The original code in this repository is released under the MIT License, unless otherwise stated. Portions of this project are adapted from or depend on third-party projects, which remain under their respective licenses:

• TRELLIS: TRELLIS models and the majority of its code are released under the MIT License. Some submodules and dependencies may have separate license terms.

• DUO: DUO is released under the Apache License 2.0. Any code adapted from DUO retains its original license notices.

• nvdiffrast: Utilized for rendering generated 3D assets. This package is governed by its own License.

• nvdiffrec: Implements the split-sum renderer for PBR materials. This package is governed by its own License.

Please refer to LICENSE, NOTICE, and/or THIRD_PARTY_LICENSES/ for details.

📚 Citation

If you use this repository, please cite our project once the paper is available:

@misc{xiang2026dvddiscretevoxeldiffusion,
      title={DVD: Discrete Voxel Diffusion for 3D Generation and Editing}, 
      author={Zhengrui Xiang and Jiaqi Wu and Fupeng Sun and Heliang Zheng and Yingzhen Li},
      year={2026},
      eprint={2605.07971},
      archivePrefix={arXiv},
      primaryClass={cs.CV},
      url={https://arxiv.org/abs/2605.07971}, 
}