Skip to content
BLBlender

Insideout - Delete Inside Geometry

by kleinARt·Workflow

Images © kleinARt. Used for product review; image policy.

Why we like it

Insideout earns its place in the Blender cleanup library by targeting one job precisely: deleting geometry that can never be seen, without remeshing what remains. The three-button workflow and Select-mode preview keep the process straightforward, and the developer backs it with lifetime updates and personal support through Superhive.

What is Insideout - Delete Inside Geometry?

Insideout - Delete Inside Geometry is a Blender add-on by kleinARt that fires millions of visibility rays at a scene — the same ray-casting technique renderers use — and deletes everything that can never be seen from outside. Screws inside housings, pistons inside engine blocks and furniture behind closed walls are removed, while the visible shell stays intact.

The workflow is three buttons: Coarse deletes fully hidden objects, Fine sweeps interior faces, and Precise deep-validates tight CAD geometry. A Select mode previews what will be removed before anything is deleted. Because it deletes rather than remeshes, surviving faces keep their exact topology, quads, n-gons, UVs, normals and material assignments — the visible surface is never touched.

It runs on a native C++ core weighing about 350 KB, saturating every CPU core with optional NVIDIA CUDA acceleration on Windows x64 and Linux x64. On a 22,308-object CAD assembly of 6.9 million tris, one Coarse click removed 81% of the scene in 22.7 seconds, and a full Precise clean stripped 93.8% of hidden geometry.

Who is Insideout - Delete Inside Geometry best for?

Insideout - Delete Inside Geometry is best for cAD and archviz artists cleaning STEP, IGES, IFC, Rhino, SketchUp and Revit imports stuffed with internal parts, plus game and real-time creators stripping invisible faces before export.

How much does Insideout - Delete Inside Geometry cost?

Insideout - Delete Inside Geometry is completely free to download and use.

Key features

  • Three-button workflow: Coarse deletes fully hidden objects, Fine sweeps interior faces, and Precise deep-validates tight CAD geometry.
  • Select mode previews what will be removed before anything is deleted.
  • Fires visibility rays at the scene and deletes geometry that can never be seen from outside.
  • No remeshing — surviving faces keep their exact topology, quads, n-gons, UVs, normals and material assignments.
  • Native C++ core (about 350 KB) that saturates every CPU core, with optional NVIDIA CUDA acceleration on Windows x64 and Linux x64.
  • Builds for Windows x64, Linux x64 and macOS Apple Silicon, shipped as a self-contained zip including runtime.
  • Lifetime updates and support from kleinARt through Superhive.

Tags

#Blender#mesh cleanup#CAD#polygon reduction#hidden geometry#archviz#game assets#optimization

Frequently asked questions

Does Insideout work with Blender 4.2 and newer?

Insideout ships as a Blender 4.2+ Superhive extension package, so it installs directly on that release line and newer. The developer also reports testing it in Blender 3.6, 4.5 and 5.1 using manual install workflows, so those versions are covered through that route rather than the extension system. If you are on 4.2 or above, use the extension package; on other versions, follow the manual install steps. Check the developer's page for the current install instructions matching your exact Blender build.

Does Insideout need an NVIDIA GPU to run?

Insideout runs on CPU by default and saturates every available core through its native C++ engine, so a dedicated GPU is not required. On Windows x64 and Linux x64 it can also use optional NVIDIA CUDA acceleration, which the developer measured at 3.7× faster than CPU alone on their benchmark scene. If you have a supported NVIDIA card on those platforms, you get the extra speed; if not, the tool still works on CPU. macOS Apple Silicon builds are available as well.

Which operating systems does Insideout support?

Insideout offers Windows x64, Linux x64 and macOS Apple Silicon builds, shipped as a self-contained zip that includes its runtime. Optional NVIDIA CUDA acceleration is available on Windows x64 and Linux x64. On macOS the native helper is unsigned, so if the system blocks it you can remove quarantine from the installed add-on folder to let it run. For current platform details and download options, see the developer's page on Superhive.

Should I apply modifiers before using Insideout?

Insideout reads the base mesh data, so apply your modifiers before running it. It also treats transparent and glass materials as occluders, which means geometry hidden behind them may be kept; exclude those materials if you need the interior removed. To stay in control, use Select mode to preview what would be deleted before committing to it. These steps help the ray-casting pass read your scene the way you expect.

Is Insideout free to use?

Insideout is listed as free in this catalog. For current licensing terms and any download or update details, check the developer's page on Superhive. The developer states the add-on includes lifetime updates, and support is available by messaging kleinARt through Superhive. Because terms can change over time, treat the developer's page as the authority on exactly what is included with your download and how it is licensed.

Similar plugins