Lumenfall Arena

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Image Upscaling
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Models · slot A

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Image Upscaling Detail & Texture Fidelity Naturalness Source Faithfulness

Feather Fidelity Challenge

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This challenge is excellent for an image arena because it brutally tests whether AI models can preserve and enhance extremely fine, layered organic structures (individual feather barbs, color gradients, and beak texture) without creating unnatural repeating patterns or over-smoothing the details.

Voters judged on
Feather Barb Detail Beak & Eye Fidelity Natural Feather Texture
How voting works
The brief Every model got the same image
Source
The leaderboard

Challenge rankings

2 models · ranked by blind vote

Through time: how it evolved
1
Crystal Upscaler
score 26.7
0
2
Recraft Crisp Upscale
score 18.0
0
Head to head 1 matchup

Notable battles

The matchups worth a second look from this challenge's blind voting: the closest rivalries, the biggest upsets (a lower seed taking down a favorite), and the clashes at the top of the board. Each bar shows how the community split its votes.

Recraft Crisp Upscale Crystal Upscaler
11% 84%
Want to compare other models? Pick any two and see them go head to head.
The archive

Through time

How Feather Fidelity Challenge has evolved, release by release.

2024 to 2025· 2 reigns· 2 models
The Reign Chain
2 reigns

How the crown changed hands

Every model that has held #1 on this challenge, in order. Click any era to travel through time.

  1. R01
    Inception
    Recraft Crisp Upscale
    Oct 2024 → Oct 2025
    reigned 1.0 yr
  2. R02
    Current
    Crystal Upscaler
    Oct 2025 → today
    reigned 9 mo · overtook Recraft Crisp Upscale

Generation history

2 models · newest first
  1. Crystal Upscaler 2 takes
  2. Recraft Crisp Upscale 2 takes