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See what your LUT actually does
Drop a .cube here, or choose a file
Everything below is rendered in your browser. Nothing is uploaded unless you ask for the scored report.
What we check
- Banding
- — smooth gradients breaking into visible steps.
- Clipping
- — detail crushed to black or blown to white.
- Hue breaks
- — saturated colours twisting to a different hue.
- Skin drift
- — faces landing outside the range real skin occupies.
- Tone reversal
- — the image darkening where it should brighten.
- Out-of-range output
- — values your NLE has to clamp.
The score only counts defects — things that are wrong in any LUT, in any workflow. Contrast, tint and saturation are creative choices, so they're reported separately as character and never cost you points. A bold look is not a broken one.
Found something broken? Pryzm Lab can repair it — it corrects the defects and leaves your look alone.
Important notes
- Rec.709 / sRGB. The test charts cover the Rec.709 range. A wide-gamut LUT (ACES, RedWideGamut) can look strange here simply because the chart can't feed it the colours it expects.
- Say what your LUT expects. Before scoring, choose whether this is a Rec.709 look or an S-Log3 → Rec.709 conversion — measuring a conversion against Rec.709 rails would tell a perfectly correct LUT that it's broken. We score what you tell us it is.
- Not a replacement for real footage. A test chart is deliberately harsher than a real frame. Use it to find problems, then confirm on your own clips.