MAJORFailure Reference

Seedance Text Rendering Failure — Pre-Generation Risk Reference

Technical Classification

Glyph Synthesis & Typographic Coherence Failure

Seedance 1 Pro shares the typographic limitation common to diffusion video models: there is no character-level encoder, so in-scene text is synthesized as visual patterns rather than reconstructed from a tokenizer. Storefront signs, screen UIs, book pages, and packaging labels routinely render as glyph-shaped marks that look text-like but spell nothing. The failure is reliably reproducible on any prompt that requests legible text.

How to identify this failure

✕Storefront sign rendered as glyph-shaped smear
✕Letters mirroring or inverting between frames
✕Brand names substituted with letter-shaped nonsense
✕Screen UI rendered as illegible mock text
✕Numbers shuffling between frames on the same surface

Real generation examples

Prompt used

"Times Square at night, neon signs reading BROADWAY"

Failure observed @ 0:00

All signage rendered as glyph-shaped smears; no legible characters in any frame

Prompt used

"Open book, page shows 'Once upon a time'"

Failure observed @ 0:02

Page rendered with letter-shaped marks that do not spell any word at 0:02

Documentation strength

If you need to escalate

HIGH — Seedance support recognises text-rendering as a current model limitation; refunds are routinely granted on documented failures.

AVA is a pre-purchase prevention tool, not a post-purchase recovery tool. Platforms generally do not guarantee credit refunds for output-quality failures; goodwill credits are at each platform's discretion. The strength rating reflects how well-formed your support ticket can be, not a promised outcome.

Prevention + documentation steps

01
Score your prompt before you generate
Run your prompt through AVA's pre-flight scoring against the Glyph Synthesis & Typographic Coherence Failure pattern. Green light = generate. Yellow/red = rewrite using the suggested fix before you commit credits.
02
Capture Generation ID + timestamp if it failed anyway
Find the Generation ID in the URL or share link. Note the exact time when the Glyph Synthesis & Typographic Coherence Failure first appears (e.g. "failure first visible at 1.2s"). Timestamped evidence is significantly stronger than a general complaint.
03
Use the correct technical term in your support ticket
Describe this failure as "Glyph Synthesis & Typographic Coherence Failure". This term maps to a recognised internal workflow in the support system and routes the ticket to the right team.
04
Submit via the correct support channel
Runway has no direct email intake. Pro+ plan: open the in-app AI Assistant (help widget bottom-right of app.runwayml.com), describe the failure with the technical term, attach evidence. Free/Standard plan: human support isn't available — your channel is Discord #community-help with @On Call - Moderators.

Frequently asked questions

Does Seedance refund credits for text rendering failures?

Yes. Submit the generation ID, prompt text, and a screenshot of the unreadable text region. Seedance support recognises Glyph Synthesis Failure as a known limitation.

Why can't Seedance render readable text?

Seedance synthesizes text as visual patterns through diffusion rather than reconstructing glyphs from a character-level model. Without a text-conditioned tokenizer in the pipeline, legible typography is statistically unlikely.

What's the workaround for Seedance text rendering?

Avoid prompts that require readable signage, packaging text, or book pages. Add text in post via After Effects or Premiere. AVA flags text-rendering risk in your prompt before submission.

Score your prompt

Score your prompt against this failure mode in 30 seconds

Paste your prompt and the platform you intend to use. AVA returns a red/yellow/green score against this specific failure mode plus a concrete rewrite if the risk is high.

Install free All 105 failure modes

AVA Pro · founders' round

$50 for 6 months of unlimited scoring across all failure modes + personal failure-history dashboard. Locks in $13/mo grandfathered after.

Claim $50 founders