SuNight
Day-to-night time-lapse · for Lightroom Classic

From sunset to a starry night, without a single jump.

Lightroom Classic applies one setting per photo, never a setting that evolves. SuNight computes, for each of your hundreds of photos, an exposure, a white balance and settings that glide smoothly from one keyframe to the next, and removes flicker.

Windows 10 & 11 · 50 photos · no credit card

Time-slice of Mount Fuji: 48 vertical strips taken from day to night DayNight

Mount Fuji, 635 RAW photos from day to night. Each vertical strip is a different moment of the time-lapse, processed with SuNight.

Lightroom can't make a setting evolve.

During a sunset, light drops by 10 to 15 stops. In Lightroom you would have to adjust every photo by hand, and the slightest mismatch shows in the video.

  • Syncing a setting copies the same value everywhere: the start looks perfect, the end is black.
  • Adjusting photo by photo creates visible jumps as soon as you play the video.
  • Changing shutter speed or ISO while shooting causes brightness steps.
  • Tiny variations in exposure and aperture make the image flicker.
Actual Mount Fuji time-lapse curve computed by SuNight
Light measured on the sensorFinal result with SuNightKeyframes

The real light (grey) drops and jumps from one photo to the next. The amber curve is what you will see in the video: continuous and smooth.

Four steps, without changing your habits.

You keep Lightroom Classic for developing. SuNight only takes care of what Lightroom cannot do.

  1. Lightroom Classic

    Edit your keyframes

    Develop 2 or 3 reference photos (day, dusk, night) and give them 4 stars.

  2. SuNight

    Analyse the folder

    SuNight measures the light of every RAW and draws the curve. One click writes the settings into the XMP files.

  3. Lightroom Classic

    Read back and export

    "Read Metadata from Files", then export to JPEG as usual.

  4. SuNight

    Build the video

    ProRes 422 HQ or H.264, in 4K or Full HD, at the frame rate of your choice.

Built for long sequences.

Every setting evolves

Exposure, white balance (computed in mireds), contrast, highlights, shadows, curves, HSL, sharpening… Every numeric value glides from one keyframe to the next.

Adjustable deflicker

Light is measured on the raw sensor data, then exposure is corrected photo by photo. Strength adjustable from 0 to 100%.

Your keyframes stay untouched

SuNight never modifies a 4-star photo or a RAW file: only the .xmp files of the other photos.

One-click undo

Before every write, the XMP files are saved into an archive. One button restores them.

Built-in video

Assembles the exported JPEGs into ProRes 422 HQ (editing) or H.264 (sharing), scaled to 4K or Full HD.

100% offline

Your photos never leave your computer. Internet is used only once, to activate the license.

Pay only for the time you need.

No subscription: a license for the duration you choose, counted from its first activation. Buy it on the day you have a time-lapse to process.

24 hours

4.90 €incl. VAT

One time-lapse to process tonight.

7 days

9.90 €incl. VAT

A trip, a weekend of shooting.

30 days

19 €incl. VAT

A whole season of time-lapses.

Best value

1 year

59 €incl. VAT

For enthusiasts and professionals.

  • All features
  • 2 computers
  • Updates during the license
  • Key emailed within seconds

Secure payment by Stripe: credit card, Apple Pay, Google Pay. Prices in euros, VAT included for EU customers. Receipt sent by email.

Download it, try it on 50 photos.

The trial does everything, with no time limit, on sequences of up to 50 photos. Analyse your real sequence anyway: the full curve is displayed, so you see the result before paying.

Download SuNight

Version 1.0.0 · Windows 10 & 11 (64-bit) · 67 MB

  • Software: Lightroom Classic with automatic XMP writing enabled
  • Photos: RAW files from most cameras (Sony, Canon, Nikon, Fujifilm, Panasonic, OM System…)
  • Mac: not yet: planned for a future version

On first launch

SuNight is independent software that Windows doesn't know well yet. The SmartScreen filter may show this warning: that's normal.

Click "More info", check that the app is SuNight, then "Run anyway". SuNight then installs in your user folder, without administrator rights.

Frequently asked questions

What is a "holy grail" time-lapse?

A time-lapse that goes continuously from day to night (or the other way round). While shooting, you lengthen the shutter speed and raise the ISO as light fades. In post-production, these changes must then be compensated photo by photo to get a smooth video: that is what SuNight does.

Can't Lightroom Classic do it on its own?

No. Lightroom syncs identical settings across photos, but it cannot gradually ramp a setting between two keyframes, nor remove flicker from a sequence. SuNight computes these values and writes them into the XMP files that Lightroom reads back.

Are my RAW files modified?

Never. SuNight only writes into the .xmp files (Lightroom "sidecars") of the photos that are not keyframes, after backing them up. Your keyframes and RAW files stay untouched.

When does the license period start?

At first activation in SuNight, not at payment. You can buy a 24-hour license in advance and activate it only on the evening you process your time-lapse.

On how many computers can I use it?

Two at the same time, for example a desktop and a laptop. To switch computers, click "Release this PC" in SuNight: the slot is freed immediately.

Do I need an internet connection?

Only to activate the license. After that, SuNight works fully offline and never uploads your photos.

What about Mac?

SuNight runs on Windows 10 and 11. A Mac version is planned: write to us to be notified when it is released.

Can I get a refund?

The key is delivered immediately and you waive the right of withdrawal at purchase. That is why the free trial lets you check everything before paying. If a technical problem cannot be solved, write to us and we will find a solution.