Sketchup Building Point Repack ●

Title: Optimizing SketchUp Models: The Art of the Geometry Repack

In the world of 3D modeling and architectural visualization, efficiency is currency. A bloated SketchUp file slows down rendering, crashes exports, and frustrates clients. While the term "building point repack" isn't standard industry terminology, it clearly refers to the process of re-packing dense geometry—specifically optimizing high-poly meshes and point clouds into manageable, lightweight components.

Here is how and why you should "repack" your building geometry in SketchUp.

2. Importing via Extensions

SketchUp requires extensions to handle point clouds. The most common is Undet for SketchUp or the SketchUp Scan Essentials extension (included with SketchUp Studio). sketchup building point repack

These tools create a "Virtual Point Cloud" inside SketchUp. Instead of loading every point as geometry (which is heavy), they render the points as a visual reference, allowing the user to rotate and zoom smoothly.

Tips & Best Practices

Work on copies of complex components; avoid editing the original until satisfied.
Use tolerances—small merging distance avoids collapsing intended detail.
For repeated assets, create low-poly LODs (Level of Detail) and swap in runtime.
Keep procedural details (textures, materials) separate from raw mesh cleanup.
When exporting for CAD/CAM, convert to solid groups/component (so tools recognize volumes).
Automate repetitive cleanup with batch scripts/plugins where possible.

Why Traditional SketchUp Fails with Raw Points

Out of the box, SketchUp struggles with high-density point data. Native .las or .xyz files containing millions of survey points will crash most standard workstations. Here is the reality check:

Native Limit: SketchUp’s inference engine tracks every point. At around 50,000 points, orbit navigation slows. At 500,000 points, the file becomes a slideshow.
The "Ghost Vertex" Problem: Hidden geometry still counts toward system memory. Deleting visible faces does not delete underlying points.
Face vs. Point Conflict: SketchUp wants planar surfaces. Point clouds are inherently non-planar. Without a repack, you are forcing a square peg into a round hole.

Thus, the repack is not optional—it is a survival tactic. Title: Optimizing SketchUp Models: The Art of the

Advanced Repacking: The "Instance Clone" Method

For repetitive buildings (apartment complexes, shopping malls), use dynamic components:

Isolate one representative unit from your repacked geometry.
Right-click > Make Component.
In the Component Attributes window, add a custom Position attribute to repack space coordinates.
Use Copy and Paste in Place across multiple grid points.

This reduces a 50MB building to 500KB by storing the building definition once and the point positions separately. These tools create a "Virtual Point Cloud" inside SketchUp

Software Ecosystem: Beyond the Repack

SketchUp handles the final repack, but consider this workflow chain:

Capture: Drone (DJI Terra) or Terrestrial Scanner (Faro)
Process: CloudCompare (free) or Autodesk ReCap (paid)
Repack Core: SketchUp Pro + Scan Essentials
Validate: Blender (point density visualizer)
Deliver: Trimble Connect