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abstract indexed · arXiv 2610.09841 · updated 2026-10-18

ORCA: Hunting Compositional Failures in Text-to-Image Diffusion

First page of ORCA: Hunting Compositional Failures in Text-to-Image Diffusion
From the original paper · arXiv 2610.09841Page 1. Select the image to read the PDF.

ORCA replaces vanilla or REPA-style diffusion training objectives with an added auxiliary loss that aligns the diffusion transformer's latent to a low-rank subspace of a frozen visual encoder, conditioned on a residual between T5 and CLIP embeddings. It costs extra training-time compute and integration complexity (a frozen visual encoder, a predictor module, and a modified loss), though it claims zero inference-time overhead and faster convergence. It can fail if the frozen visual encoder's low-rank subspace does not capture the compositional information needed for a given domain, and the reported gains are validated only on class-conditional and small-scale backbones, not on production-scale text-to-image systems.

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research area
efficient training
technical change
Auxiliary cross-modal alignment loss for diffusion training
published
2026-10-07

The method requires modifying diffusion training from scratch with custom backbones, which the reader's constrained infrastructure and third-party-API reliance make impractical to adopt or validate directly.

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  1. claim 01Paperraft inference
    Read the brief interpretation

    ORCA replaces vanilla or REPA-style diffusion training objectives with an added auxiliary loss that aligns the diffusion transformer's latent to a low-rank subspace of a frozen visual encoder, conditioned on a residual between T5 and CLIP embeddings. It costs extra training-time compute and integration complexity (a frozen visual encoder, a predictor module, and a modified loss), though it claims zero inference-time overhead and faster convergence. It can fail if the frozen visual encoder's low-rank subspace does not capture the compositional information needed for a given domain, and the reported gains are validated only on class-conditional and small-scale backbones, not on production-scale text-to-image systems.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

    Inspect the source
  2. claim 02Paperraft inference

    On DiT-L/2, ORCA reaches FID 16.65 and GenEval 0.291 at 200K steps, exceeding the strongest 400K-step baseline at half the training cost, with largest gains on attribute binding, spatial relations, and multi-object prompts.

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quality

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compute and memory

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latency

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operations

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software compatibility

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data and training

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reproducibility

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arXiv 2610.09841

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