3D Scanning Errors
We’ve shared before how critical 3D scanning has become for our recent retrofit work. It provides the high-resolution foundation we need to design with confidence. However, when an existing building (or its contents) involves significant expanses of glass - from facade elements to “recreational glass water features" - the data can get a little cloudy.
Given the date, it felt like the right time to share a few technical insights we’ve recently dug into regarding the limitations of the process and how to see through the noise.
Even the most advanced LiDAR equipment can have a complicated relationship with transparency. Here is what is actually happening when the scanner meets glass:
▪️ Signal Penetration: LiDAR works by measuring the time it takes for light to bounce off a surface. Because glass is clear, the laser often passes right through, resulting in missing geometry where the scanner perceives only empty space.
▪️ Refractive Distortion: When the laser does register the glass, it often refracts at unpredictable angles. This creates "noise" in the data, resulting in a point cloud that looks more like a warped sculpture than a precision-engineered structure.
To achieve the accuracy required for high-level BIM integration, there is a workaround: applying a temporary matte developer spray. This dulls the surface just enough for the laser to catch it, ensuring every edge is documented with 100% precision.
In our field, we are constantly navigating the complexities of tricky renovations and sensitive site conditions. Success is about finding the right tools to clear the "haze" so we can focus on what really matters: great design.
Wishing everyone a creative and inspired day. And remember, if your 3D model looks a little distorted today, it’s likely just the glass.
