MeshLab - Decimate a model

MeshLab is an open-source, advanced 3D mesh processing software system.

This article will show you how to reduce the polygon/face count of a model for better performance on Sketchfab. This is especially relevant for high-resolution 3D scans/maps and heavy CAD files.

Open your model in MeshLab. For example, drag and drop the OBJ file from your 3D scan into the window or go to File → Import Mesh... and navigate to your file.

Decimate a 3d mesh in MeshLab for uploading to Sketchfab

Decimate a 3d mesh in MeshLab for uploading to Sketchfab

Go to Filters → Remeshing, Simplification and Reconstruction → Quadric Edge Collapse Decimation (with texture) (if you're using a texture).

Decimate a 3d mesh in MeshLab for uploading to Sketchfab

Choose a Target number of faces. Try 1 million, or 500,000 if the model quality doesn't deteriorate too much. Then click Apply.

Decimate a 3d mesh in MeshLab for uploading to Sketchfab

When it finishes, Export mesh as... (e.g. OBJ) and make sure the TexCoord options are enabled if you're using a texture.

Decimate a 3d mesh in MeshLab for uploading to Sketchfab

Then, you can upload the new mesh to Sketchfab.

 

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