Common Scan Issues

Understanding the scan process and certain scan results might be tricky at first. In this article, we'll cover the common scan issues and how to resolve them.

Scan Issue: Wobbly Edges / Hole Filling

An important concept to understand with the Lightform device scan is "hole-filling." Because the Lightform device camera lens and your projector lens can never be in the exact same physical position, there will always be small portions of the scene that can be seen by one lens but not the other. These are referred to as "shadows" or "blindspots."fov_differences.jpg

In the above diagram, the projector is able to see underneath the shelf and plant, but the Lightform device can not. This will result in a shadow in the final scan, which is normal.

Automatic Hole-Filling

After a scan is complete, Lightform Creator attempts to fill in these blindspots using a nearest neighbor technique. Essentially, the software samples nearby colors and attempts to fill in the shadows according to nearby values.

However, it is often the case that you will not want hole filling at the maximum setting, because this can cause an effect where your scan has "wobbly edges," making it difficult to create a precise mask.

The solution to wobbly edges is to modify the "Fill" slider after the scan is complete.

Optimal Hole-Filling Technique

In the above video, we demonstrate a technique for getting precise edges in your scan by decreasing the hole filling slider all the way to 0%, then slowly bringing it back up to an amount where your objects are fully filled in, but the shadows are not. In this particular case, around 20%.


Trying to create a precise mask with 100% hole filling, it can sometimes be difficult to determine where the edge of an object is.


With hole-filling set to 19%, we are able to see clearly where the Lightform device's blindspots are, and therefore create a nice clean mask on the flower.

Scan Issue: Dark & Noisy Scan

projector-color.jpgProjector Scan Result that appears dark and noisy


When scanning in dark environments, the projector scan result looks dark and noisy.


Adjust the Brightness slider. After you scan is complete, before you add any surfaces, adjust the "Brightness" slider to blend between the "projector off" and "projector on" scan images.

When the Lightform device performs a scan, it produces two final images: one with the projector 100% off, and one with the projector 100% white. In dark environments, the "projector off" image may be under-exposed and appear noisy. You can blend between these images by adjusting the brightness slider. 


projector-color1.jpgProjector Scan Result that appears bright and clean

Scan Issue: Movement During Scan

projector-color-1.jpgProjector Scan Result

camera-color.jpgLightform Device Camera View


Sean wanted to show off his cool tropical shirt while we were doing a scan. This caused incorrect graycode correspondences, and affected other regions of the scan. Thanks, Sean. 🙄


Get Sean outta there! It is important to have no movement in the projection area while performing a scan.

Scan Issue: Reflective Surfaces

projector-color-2.jpgProjector Scan Result

camera-color-1.jpgLightform Device Camera View


Woah, looks like someone was having fun with this one! This scene includes many reflective and transparent materials, which can cause the light of the Lightform device's graycodes to bounce around and create incorrect correspondences.

Solution 1

Reduce or remove all reflective and transparent surfaces, or rotate them so the light is not being bounced into other areas of the scene.

Solution 2

You can treat reflective surfaces with a temporary dulling spray. This will give them a more matte finish which will scan better.

Here are our recommended dulling sprays:

  1. Krylon Matte Dulling Spray (North America)
  2. K-Line Matt Dulling Spray (Europe)

Scan Issue: Projector Out of Focus

Capture.pngLive Camera Preview (before scan)

projector-color-3.jpgProjector Scan Result


The scan result is noisy and has lot of holes. This is because the projector was out of focus, as you can see in the Lightform device's live camera preview on the top.

Solution 1

When you see the Lightform device's test pattern before you perform a scan, ensure that the projector is in focus, and you see sharp pixels on the object you are trying to scan.

Scan Issue: Very Thin Materials

projector-color-4.jpgProjector Scan Result

camera-color-2.jpgLightform Device Camera View


Often times, very thin materials such as string can come out looking wobbly, or not show up at all in a scan.


If you can see the material in the scan but it looks wobbly, refer to the above solution for "Scan Issue: Wobbly Edges / Hole Filling" If the material is so thin it does not appear at all, then you can try moving the projector closer, or avoid using this material entirely.

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  • Comment actions Permalink
    Molly Toberer

    Please expand on scanning technical difficulties. I cant get any good scans only giant uneven holes.

  • Comment actions Permalink

    Hi Molly, 

    We're sorry for the trouble you've been experiencing with scanning. The first thing I'd check is to make sure you can see the test card pattern displayed over your scene very visibly before taking your scan. If the ambient light in the room is too bright and you can't see the test pattern clearly, this might be an issue.

    So we can assess the issue and provide more detailed recommendations, would you mind sending us a recent project with bad scans that you've saved? To do so, please go to File->Archive Project, create a new directory in a common location to save the project to and then zip up the saved archive directory and send it to us at



  • Comment actions Permalink
    Rick Robinson

    I have the LFC and projector covering my entire house with a few feet extra on each side to the left and right. I have tried scans at several times of the evening which included complete darkness to around dusk.

    All of the scans are about the same, there are large holes on the left and right-hand side. I would say about 85% of the house is perfect but the outside edges are not.

    Any suggestions on how to have a good scan cover the entire house? If not, is it possible to combine scans to make one good one?



  • Comment actions Permalink

    Hi Rick Robinson, have you tried using the Camera Mask feature in the scan dialog? It gives you the option to define a region to scan by drawing a rectangle around it and can prevent holes from appearing in scans. Give it a try and if you're still having issues please reach out to us at