Can you see inside your 3D model using the ʼSection Analysisʼ tool in Autodesk Fusion?

Short Answer

Yes — in Autodesk Fusion, you can see inside your 3D model using the section analysis tool, which is the most common professional method for inspecting internal features, wall thickness, cavities, and fit conditions without changing the body. It creates a visual cut only, not real geometry.

What You Need to Know Before

Warning: Section Analysis is only a display analysis, so it does not actually split or edit the model. If you inspect the wrong component level or have hidden bodies, the section view can mislead you about clearances or internal interference.

How to Use Section Analysis in Autodesk Fusion

• Command: Section Analysis

• Shortcut: None by default

• Quick Steps:

  1. Go to the Inspect menu and choose Section Analysis.
  2. Select a plane, planar face, or origin plane to define the cut.
  3. Adjust the section manipulator or Offset value, then click OK to view the internal geometry.

Variables & Settings

• Key Setting: Offset

• Expert Setting: Offset moves the cutting plane through the model, which is the fastest way to inspect different internal regions without creating new construction geometry. You can also flip the section direction if the visible side is not the one you need.

Why it Fails

• Cause 1 (Geometry): The selected section plane does not pass through the internal feature you want to inspect.
• Cause 2 (layers/Locks): The needed component or body is hidden, suppressed, or not active in the current view state.
• Cause 3 (Command/Logic): Section Analysis is visual only, so users sometimes expect editable cut geometry or measurable section profiles directly from it.

Quick Fix & Best Practice

• Quick Fix: Turn on the correct component visibility in the Browser, then rerun Inspect > Section Analysis and adjust the Offset until the cut passes through the target feature.
• Manager’s Verdict: Use Section Analysis for fast design reviews, internal inspection, and assembly checks. Avoid relying on it when you need actual cut bodies, manufacturable sections, or downstream geometry edits.

FAQ

Can Section Analysis modify the solid body?
No, it only creates a visual sectional view.

Can you section an assembly in Autodesk Fusion?
Yes, Section Analysis works well for checking inside assemblies.

Can you move the section after creating it?
Yes, you can edit the analysis and change the offset or plane position.

.