How to Speed Up Photo Culling with Burst Stacking in SnapCuller

Every photographer has been there: you hold down the shutter for a three-second burst and suddenly have 30 nearly identical frames in your gallery. Multiply that across an entire wedding, sports event, or portrait session, and you are staring at thousands of photos where 80% are duplicates of the same moment.

Scrolling through these one by one wastes enormous amounts of time. You lose your flow comparing frame 17 to frame 18 when the difference is a millimeter of eye position. Traditional culling tools force you to evaluate every single frame individually, even when most of those frames are burst duplicates.

Burst Stacking solves this by automatically grouping consecutive burst shots into a single visual unit — a stack. Instead of seeing 30 individual thumbnails, you see one thumbnail with a badge that says "30." You evaluate the group, pick the best frame, and move on.

SnapCuller's stacking engine analyzes the EXIF timestamps of your photos. When multiple photos are captured within a short time window (the "time gap"), they are grouped into a single stack. The cover image — the first frame in the burst — represents the entire group in Grid View.

Key concepts

The fastest way to create stacks is to let SnapCuller do it automatically. The Auto Stack dialog analyzes every photo in your folder and groups them based on the time gap between shots.

How to use Auto Stack

1. Open the Sidebar and look for the Stacking section, or use the Stack toggle button in the Grid Header.
2. Click Auto Stack Photos to open the stacking dialog.
3. Set the Time Gap. For high-speed burst shooting (sports, wildlife), a 2-second gap works well. For slower sequences (portraits, events), try 10–30 seconds.
4. Set the Minimum Photos per Stack. The default of 2 ensures single photos are not stacked alone.
5. Optionally, set the Maximum Photos per Stack to cap stack sizes. This is perfect for real estate photographers working with consistent HDR brackets of 5 or 6 exposures.
6. Check the Preview at the bottom of the dialog to see how many stacks will be created before committing.
7. Click Create Stacks.

Grid View: the big picture

When stacking is active, your Grid View transforms. Instead of seeing every individual frame, burst groups are collapsed into single thumbnails with a Stack badge showing the count. The header also updates to show both the total photo count and the visible item count after stacking.

Peek Overlay: quick preview in Grid View

Want to quickly see what is inside a stack without leaving Grid View? Click the Peek button on any stacked thumbnail. A sleek overlay opens on top of the grid, showing all the frames in the stack. From here, you can select the best photos and Unstack them to pull them out of the group.

Stack Strip: detailed inspection in Single View

When you open a stacked photo in Single View, a Stack Strip appears as a horizontal filmstrip showing all members of the current stack. Click the Stack (N) toggle button in the toolbar to show or hide it.

The Stack Strip stays closed by default to keep the workspace clean. When open, it provides a focused mini-gallery of just the burst group — perfect for comparing frames side by side without distraction from the rest of your shoot.

1. Load your folder and enable stacking

Open the folder containing your shoot. Click Auto Stack Photos in the sidebar. Set your time gap based on how you shot (2 seconds for high-speed burst, 10+ for general event work), then hit Create Stacks.

Your grid immediately collapses. A 2,000-photo wedding might go from 2,000 visible items down to 600–800, depending on how many bursts you shot.

2. First pass: flag stacks in Grid View

Scan through the grid using the stacked thumbnails. For each stack:

• If the entire moment is a technical failure (wrong exposure, test shot, accidental shutter), press X to reject the stack. Every photo in the stack gets the reject flag.
• If the moment looks promising, skip it for now — you will come back in the next pass to find the best frame.

3. Second pass: pick the best frame from each stack

Now switch to Single View. Navigate to each surviving stack and open the Stack Strip by clicking the Stack toggle. Browse the burst members using [ and ] to cycle through them.

For each stack, find the sharpest frame with the best expression or moment, and press P to pick it. The other frames in the stack remain unflagged — they serve as backup alternatives.

4. Peek and Unstack to pull the perfect frame

When you want to pull the perfect frame out of a burst, simply click the Peek button on the stack in Grid View. This displays all photos in the stack. Select the files you think are best, then click Unstack. This pulls your chosen frames out of the group and places them back into your main grid, ready for your standard workflow.

5. Apply ratings, then export

Once you have picked the best frame from every stack, apply star ratings to tier your selections (see the star rating tutorial). Then filter to your desired quality level (e.g., 4+ stars, Picked flag), select all, and export.

Sports and wildlife photography

High-speed burst shooting is the norm. A single action sequence — a goalkeeper's dive, a bird taking flight — might generate 20–50 frames. Without stacking, your grid is overwhelmed with nearly identical images. With stacking:

• Time gap: 2 seconds. Sports bursts are fast and continuous.
• Max per stack: Leave unlimited. Let the natural breaks between action sequences define your stacks.
• Workflow: Use Focus Peaking to quickly find the sharpest frame in each action burst.

Wedding and event photography

Weddings mix burst moments (first kiss, confetti throw) with slower, deliberate shots (detail flat lays, venue wide angles). A wider time gap captures the burst moments while leaving standalone shots unstacked.

• Time gap: 5–10 seconds. Captures burst sequences while keeping individual shots separate.
• Min photos per stack: 3. This prevents slow pairs (like two casual portraits) from being stacked together.
• Workflow: Combine stacking with color labels. After picking the best frame from each stack, label by scene (Red = Ceremony, Green = Reception) for organized delivery.

Real estate and HDR photography

HDR brackets are the most predictable stacking scenario. Every shot is a fixed sequence of 3, 5, or 7 exposures. Stacking keeps each bracket as a clean unit.

• Time gap: 2–5 seconds (brackets are rapid).
• Max per stack: Set to your bracket count (e.g., 5). This prevents two adjacent brackets from merging into one oversized stack.
• Workflow: Review each bracket as a unit. Reject entire brackets where the exposure sequence failed (camera shake, moving subjects).

Portrait sessions

Portrait photographers often fire 3–5 quick frames per pose to ensure at least one has sharp eyes and a natural expression. Stacking groups these per-pose bursts together.

• Time gap: 5 seconds. Captures each pose burst while separating different poses.
• Workflow: Use the AI Face Detection panel alongside the Stack Strip. For each burst, check the face crops to find the frame with the best expression and sharpest focus on the eyes.

Burst Stacking is most powerful when combined with the other classification tools in SnapCuller. Here is the complete three-layer workflow:

When stacking is active, SnapCuller's batch operations become stack-aware. This means actions you perform on a stack automatically apply to all photos within it:

Burst Stacking transforms how you handle high-volume shoots by collapsing burst sequences into manageable visual units. Instead of evaluating every individual frame, you work with moments — and only expand a stack when you need to find the best frame.

Whether you are shooting sports at 20 fps, weddings with quick bursts, or real estate with HDR brackets, Burst Stacking eliminates the visual clutter and lets you focus on what matters: finding the best moments in your shoot.

Combined with flag keys, star ratings and color labels, and AI Smart Culling, Burst Stacking completes SnapCuller's toolkit for handling shoots of any size with speed and precision.