Misaligned geometry and duplicate structures in single RealityScan component

General Feedback & Requests
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1

Hey, I’m running into an issue with RealityScan where my dataset aligns into one component, but the result is way off. I captured the site using a drone with both orbit and straight-line passes, and used the video sequence tool to extract frames.

After alignment, the model looks like the same area has been duplicated and slightly shifted — both vertically and horizontally. It’s like the same structures show up multiple times but in the wrong spots. The camera tracks also look split and drifted.

I tried adding 4 control points across the loops and re-aligning, but it didn’t seem to help. I’m not getting multiple components, just one — but it’s internally misaligned.

Has anyone run into this? Is it a control point issue, or maybe something with the video frames or too much overlap? Would love any tips on how to clean this up or prevent it in the future.

Thanks!

Skärmbild 2025-08-05 105517
Skärmbild 2025-08-05 1055171739×527 197 KB

2

Hello :slight_smile:

Here are a couple of tips that might help:

Add More Control Points

  • Connect the start and end of your flight loops.
  • Place them at different elevations (e.g., ground and roofline).
  • Spread them across both your orbit and linear flight paths.
  • Make sure they’re visible in both sets of images, ideally 3–5+ images per point.

Check for Bent or Curved Alignment

  • What you’re seeing (duplicated or shifted structures, drifting cameras) could be the banana effect — common in looped datasets with weak constraints.
  • Epic Games has a great guide on how to recognize and fix it:
    :backhand_index_pointing_right: Banana Effect – What to Do If My Model Is Bent

Hope that helps! Let us know how it goes.

Cheers

MC

3

Thanks for your input!

I will look into it and get back.