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Cullr - A Camera-Based Selection Tool

by Max Miles·Workflow

Images © Max Miles. Used for product review; image policy.

Why we like it

Cullr earns its place in the Superhive library for a focused approach to geometry optimization: selecting only what the camera sees, driven by raycasting and custom occluders.

What is Cullr - A Camera-Based Selection Tool?

Cullr is a Blender add-on built around camera-based visibility selection. By firing rays from the camera, it identifies which parts of an asset are actually visible and lets you select them with a single click, so hidden or overlapping geometry can be cleaned out. You define your own occluders to block visibility, giving you control over what counts as seen.

The tool is aimed at two main tasks. For cleanup, it targets photo-scanned assets—such as stacked scans—where hidden junk geometry sits underneath the visible surface; Cullr selects only what the camera sees so the rest can be removed. For subdivision, it lets you mask and isolate the visible geometry across an entire frame range, so displacement and subdivision go only where the camera can see them.

Cullr works non-destructively through its masking mode and supports frame ranges for animations. The result is leaner scenes with polygons concentrated on the parts that are visible in the final render. Documentation is included, and the developer's page shows the tool applied to photogrammetry cleanup and subdivision optimization.

Who is Cullr - A Camera-Based Selection Tool best for?

Cullr - A Camera-Based Selection Tool is best for blender artists working with photo-scanned assets who need to remove hidden geometry or focus subdivision on camera-visible areas.

How much does Cullr - A Camera-Based Selection Tool cost?

Cullr - A Camera-Based Selection Tool is completely free to download and use.

Key features

  • Camera-based visibility selection using raycasting
  • Custom occluders to block visibility
  • Non-destructive masking mode
  • Frame range support for animations
  • One-click selection
  • Documentation included

Tags

#camera-based#selection#photogrammetry#cleanup#subdivision#non-destructive#raycasting#optimization

Frequently asked questions

What Blender versions does Cullr support?

Cullr lists support for Blender versions 4.4 through 5.0. If you are running an earlier release, check the developer's page to confirm compatibility with your setup. Because it operates on camera visibility and geometry selection within Blender, staying within the stated version range is the safest way to ensure the raycasting and masking features behave as described. The developer's page is also the best place to verify the current version details before installing.

How does Cullr decide which geometry to keep?

Cullr fires rays from the camera to determine which parts of an asset are actually visible, then selects those parts with one click. You can define your own occluders to block visibility, giving you control over what the tool treats as hidden. This lets you isolate visible geometry—for cleanup or for targeting subdivision—and remove or work only on the parts the camera sees.

Does Cullr work across animation frames?

Cullr supports frame ranges, so its selection can account for what is visible across an entire animation rather than a single still. The developer describes masking and isolating visible geometry across a full frame range, which is useful when prepping an asset for close-up displacement. This helps concentrate subdivision only on the areas visible to the camera throughout the sequence.

Is Cullr free?

Cullr is listed as free in this catalog and is released under the GPL license. For the most current licensing terms and details, visit the developer's page. Cullr is created by Max Miles, and additional information along with documentation is available there. A demo video is also available if you want to see more before installing.

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