First check whether the climber is dark in the original
A bright window behind a climbing wall can leave the climber looking like a silhouette. You may still recognize the route, but hand contacts and foot placements become difficult to review. Before changing an editor, play the original recording in your phone's photo app. Look at the same move in the original and the edited copy, with the same display brightness.
If the original is already dark, start with the filming conditions. If only the edited or shared version looks dark, preserve both files and compare the export and playback stages instead. A different display, player, or processing step can change how a clip appears; this checklist does not diagnose every difference as backlighting or an app defect.
1. Change the angle before reaching for brightness controls
From a permitted filming position, try moving the camera so a bright window or doorway is no longer directly behind the climber. Keep the full route and the likely movement area visible. Record a short test from each practical position rather than assuming the angle that looks best to your eyes will record best on the phone.
Camera placement is constrained by safety and gym rules. Do not put a tripod on a landing zone, block a walkway, move another person's equipment, or stand under a climber just to improve exposure. If no safe angle works, accept an imperfect recording or skip it. Our filming-position checklist covers that decision separately.
2. Test the climber's visibility, not just the wall
Use the same camera, lens, and video mode you plan to use for the attempt. If your camera provides exposure adjustment, consult its own controls and make a modest change while watching the climber. Control names and behavior differ across phones, modes, and camera apps; do not assume a still-photo setting also applies to your selected video mode.
Make a short recording with someone standing in the relevant part of the frame, with their consent. Play it back. Can you distinguish a hand from the hold and a shoe from the foothold? Can you still read the finish? A preview is useful, but the saved file is the evidence you will use for beta review.
A brighter climber is not the only criterion. Check whether bright wall sections have become featureless and whether the image becomes visibly noisy. There is no universal exposure value for a climbing gym. Start with the smallest adjustment that makes the movement legible, then compare another saved test.
3. Check the whole movement path for brightness changes
A climber may start under a dark overhang and finish near a bright window. A test of the starting stance alone does not cover that range. Review the darkest and brightest parts of the expected movement path without asking anyone to climb beyond their normal plan for the camera.
If your camera supports locking exposure in the current mode, compare a locked test with its automatic behavior. Locking can reduce unwanted changes in one scene but can also leave later sections too dark or too bright. Use the result, not the label, to decide. Recheck after changing lens, mode, or camera position because settings may not carry over.
4. Keep darkness separate from other recording problems
- Hands are bright enough but smeared during a move: that is not the same symptom as a silhouette. Do not expect a brightness adjustment alone to restore motion detail.
- The wall pulses or dark bands move through the picture: use the indoor-light flicker checklist rather than repeatedly raising exposure.
- The climber is soft while the background is sharp: compare the saved tests using our focus troubleshooting guide.
- The original is readable but the shared copy is not: compare the original and saved export in the same player before changing your next filming setup.
5. For footage you already recorded, work on a copy
Keep the unedited recording. If your editor offers brightness, shadows, or exposure controls, make a separate test copy and apply a small adjustment. Compare the result at the exact hand and foot contacts you want to study, not only at the opening frame.
Check darker areas for noise and bright areas for lost detail. Brightening cannot guarantee that previously indistinguishable holds or contacts become reliable evidence. Avoid heavy adjustments that make a clip look dramatic but make movement harder to interpret. Do not describe a clearer-looking edit as proof of exactly where a hidden hand landed.
Export a short sample if your editor allows it, then check that saved file before processing the full session. This is general editing advice, not a claim that CruxCut includes exposure correction or that a particular export format will fix dark footage.
A quick pre-attempt checklist
- Safe, permitted camera position with consent from identifiable people.
- Bright background moved out of the frame where practical.
- One saved test in the intended lens and video mode.
- Hands, feet, and the finish readable across the movement path.
- Any exposure adjustment checked for noise and lost bright detail.
- Original retained before making an editing copy.
Once the movement is visible, use attempt-by-attempt beta review to decide what the recording actually shows. A useful review clip does not need perfect lighting, but it does need enough visible information for the question you are trying to answer.
Scope and limits
This is an editorial filming and comparison workflow, checked November 14, 2026. Examples describe possible gym-lighting situations, not a measured diagnosis of a specific device. Controls depend on your camera and software. No recovery rate, supported exposure feature, or guaranteed improvement is claimed. When changing the angle or exposure is not safe or does not improve a saved test, keep the original and choose another recording opportunity.