FLUX.2 UltraHD RAW VAE

This VAE works with all FLUX.2 models including Klein, FLUX.2, and Ernie

Quick Assessment:

Color enhancement by both increasing number of colors used, and a slight increase in saturation, without luminance or contrast corruption.
Increase in sharpness/gradient energy

The detailed stats are found below, note while the model is 4.1x "worse" on LPIP's FLUX.2 scored an insane 0.0073 both scores are magnitudes of order below human perception.

Side Note: While the video effect showing the enhancement is not as eye catching or dramatic as my other VAE's the amount of failed trainings exceeded double digits to create a VAE with a LPIPS close to FLUX.2

Direct Metric Comparison (150 Image Test VS Base FLUX.2)

LPIPS

FLUX Base: 0.0073
UltraHD RAW VAE: 0.0303
Difference: 4.1× higher
Meaning: Less reconstruction-faithful but more enhancement-oriented

Gradient Energy

FLUX Base: 405.5
UltraHD RAW VAE: 633.5
Difference: +56%
Meaning: Significantly sharper detail and stronger edge enhancement

Unique Colors

FLUX Base: 37,369
UltraHD RAW VAE: 39,184
Difference: +4.9%
Meaning: Richer color variation and smoother HDR gradients

Brightness Bias

FLUX Base: 0.0047
UltraHD RAW VAE: 0.0030
Difference: Slightly improved
Meaning: Excellent luminance preservation

Contrast Gain

FLUX Base: 0.984
UltraHD RAW VAE: 0.983
Difference: Nearly identical
Meaning: HDR tone and dynamic range preserved

Red Shift

FLUX Base: +0.0048
UltraHD RAW VAE: +0.0188
Meaning: Slightly warmer red response

Green Shift

FLUX Base: -0.0037
UltraHD RAW VAE: -0.0104
Meaning: Minor reduction in green balance

Blue Shift

FLUX Base: +0.0181
UltraHD RAW VAE: +0.0434
Meaning: Stronger blue/cyan HDR emphasis

Summary

FLUX.2 UltraHD RAW VAE is designed for HDR enhancement, texture recovery, sharper detail, richer gradients, and cinematic rendering rather than strict pixel-perfect reconstruction. Compared to the base FLUX VAE, it produces substantially stronger edge detail, improved color richness, and enhanced microcontrast while maintaining stable brightness and contrast behavior.

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