Mesh Check  — Real-Time Topology Validation & Fixes

Catch topology problems the moment they happen — right in the viewport.

Mesh Check shows your mesh problems in 3D, exactly where they are — no exporting, no separate validator, no guessing. Fix any issue with a single click, and for every fix it even shows the manual Blender steps, so you learn how to do it without the add-on too.

Current version 1.3 · Blender 5.0+

Why Mesh Check?
It's live, in-viewport, and one-click. And unlike simpler checkers, its flipped-normal detection uses Blender's own Recalculate Outside logic — a clean mesh flags nothing, and only the faces that are truly reversed get marked.

🔍 What it catches

• N-Gons — faces with more than four sides (orange fill)
• Boundary / open edges (cyan)
• Coincident vertices — overlapping points, with live counts (red)
• Loose geometry — stray vertices and edges (yellow)
• Inconsistent normals — pinpoints only the faces actually wound the wrong way, not the whole mesh (purple)
• Non-applied object scale

⚡ Built for a real workflow

• Live, throttled scanning that stays out of your way
• A compact viewport HUD shows issue totals at a glance and how many meshes are affected — click the status badge to toggle monitoring on or off
• A per-mesh breakdown in the sidebar — click any mesh name to select it instantly, with the current selection highlighted
• Inspects multiple objects at once

🔧 Fix it, fast

• Targeted fix buttons that appear only for the issues on your current selection
• Fix All Selected — clean every selected mesh in one pass
• Fix All in Scene — clean every flagged mesh at once
• Each fix also shows the manual Blender equivalent, so it doubles as a learning tool
• Fully undoable, using Blender's native operators

⚙️ Fine-tune everything

Toggle individual checks and overlays, set the merge tolerance and label size, or limit scanning to the current selection.

👤 Who it's for

Modelers, game and asset artists, and anyone prepping meshes for export, baking, or 3D printing who wants clean topology without breaking flow.

✅ Compatibility

• Blender 5.0 and newer
• Installs as a modern Blender Extension (Install from Disk, or drag-and-drop the .zip)

Stop hunting for that one flipped face or stray vertex.
Mesh Check keeps your meshes honest while you keep modeling.

Created by Hauzer László Cole · 3dmentor.hu