PixARMesh: Autoregressive Mesh-Native Single-View Scene Reconstruction

TL;DR

PixARMesh is a novel autoregressive method that reconstructs complete 3D indoor scene meshes from a single RGB image, integrating object layout and geometry prediction in a unified model for high-quality, ready-to-use meshes.

Contribution

It introduces a unified autoregressive framework that jointly predicts scene layout and geometry directly from a single image, bypassing implicit representations and post-processing.

Findings

Achieves state-of-the-art reconstruction quality on synthetic and real datasets.

Produces lightweight, high-fidelity meshes suitable for downstream tasks.

Operates efficiently in a single forward pass without post-hoc optimization.

Abstract

We introduce PixARMesh, a method to autoregressively reconstruct complete 3D indoor scene meshes directly from a single RGB image. Unlike prior methods that rely on implicit signed distance fields and post-hoc layout optimization, PixARMesh jointly predicts object layout and geometry within a unified model, producing coherent and artist-ready meshes in a single forward pass. Building on recent advances in mesh generative models, we augment a point-cloud encoder with pixel-aligned image features and global scene context via cross-attention, enabling accurate spatial reasoning from a single image. Scenes are generated autoregressively from a unified token stream containing context, pose, and mesh, yielding compact meshes with high-fidelity geometry. Experiments on synthetic and real-world datasets show that PixARMesh achieves state-of-the-art reconstruction quality while producing lightweight, high-quality meshes ready for downstream applications.