Installation :

1. Download the addon ZIP file.
2. Open Blender.
3. Go to Edit > Preferences > Add-ons.
4. Click Install.
5. Select the ZIP file.
6. Enable Mesh Quality Heatmap.
   

Opening the Addon :

Open:

3D View > Sidebar (N) > Mesh Quality.

How to Use :

1. Select a mesh.
2. Choose one of the available Heatmap Modes.
3. Configure the available settings (if applicable).
4. Press Apply Heatmap.
5. The mesh will be colored according to the selected analysis.

Blue generally represents lower values while red represents higher values.

Heatmap Modes :

Texel Density :

Displays UV texel density across the mesh.

Useful for:

• Consistent texture resolution.
• Game asset optimization.

UV Stretch :

Highlights UV distortion.

Useful for:

• Finding stretched UVs.
• Improving texture quality.

Polygon Density :

Shows areas with dense or sparse geometry.

Useful for:

• Mesh optimization.
• Even polygon distribution.

Edge Length Variation :

Highlights inconsistent edge lengths.

Useful for:

• Retopology.
• Smoother subdivision.

Triangle Quality :

Measures how close triangles are to an ideal equilateral shape.

Useful for:

• Simulation.
• Physics.
• Game meshes.

Curvature :

Visualizes mesh curvature.

Useful for:

• Detecting sharp transitions.
• Surface analysis.

Normal Deviation :

Shows differences between face normals and shading normals.

Useful for:

• Smoothing issues.
• Shading artifacts.

UV Island Scale :

Displays texel density per UV island.

Useful for:

• Keeping UV islands consistent.

Vertex Density :

Shows average mesh density around vertices.

Useful for:

• Detecting uneven topology.

Overlapping Geometry :

Highlights duplicated or overlapping faces.

Useful for:

• Cleaning imported meshes.
• Removing duplicate geometry.

Ngon Heatmap :

Colors polygons by type:

• Blue : Triangles.
• Green : Quads.
• Red : N-gons.

Useful for:

• Retopology.
• Game-ready meshes.