“Non-manifold” edges and vertices look those like the ones shown below from Martin Sälzle at PCL Developer’s Blog. If the mesh of your model has faces that meet together in geometrically unpleasant ways, then you’ll need to repair it before 3D printing see the Shapeways article Fixing Non-Manifold Models. Or, try a quick overall fix in MeshLab by selecting “Normals, Curvature, and Orientation” from the Filters menu, then choosing the “Re-orient all faces coherently” tool. If some of your model appears “inside out” (like the black area in the image below), then you should select and flip any reversed normals using the method outlined in the recipe Using MeshLab for fixing normals in the 3D Printing with RepRap Cookbook. to MeshLab veterans: Good news! MeshLab updated to a long-awaited new version in late 2016, and in the new version you can perform “QECD” multiple times in a row without crashing the program! There’s still no “undo” in MeshLab though, alas. To reduce the overall number of triangles in your model, open the model in MeshLab and from the Filters menu select “Remeshing, Simplification, and Reconstruction” and then “Simplification: Quadric Edge Collapse Decimation.” For more detailed information, see the Shapeways Tutorial Polygon Reduction with MeshLab as well as Mister P.’s video Mesh Processing: Decimation. Shapeways can accept 3D models with up to one million triangles, but it’s surprisingly easy to go over that threshold, especially if you’re working with 3D scans or a sculpting program. Let us know in the comments if you have other mesh-repair techniques to share! Reducing Triangle Count MeshLab has a dizzying array of menu items with long names, but if you know just which ones to choose then you can repair these three types of issues very quickly. We’ll focus on the top three issues that can arise with meshes: having too many triangles (too fine a mesh), having triangles that are oriented incorrectly or inconsistently, and having triangles that intersect with bad geometry. Sometimes there are problems with that mesh that cause printability issues, and MeshLab can help you fix most of those issues to make your files ready for printing. When you export a 3D file to STL format, what you’re doing is creating a file that describes the surface of an object with a mesh of tiny triangles. mtl file to refer to to Tutorial Tuesday! This week we’ll discuss three methods for modifying 3D meshes with the free software MeshLab. I converted the texture.png to texture.jpg which was only 3+ MB and edited the. ![]() The mtl file references the original texture file used by my dae model - which was a png file of 49+ MB. When saving my model as an obj the file size reduced from a dae at 74+ MB to an obj at 26+ MB with the creation of an. ![]() Which isn't a simplication if you are looking for a menu entry beginning with Q. "Filters → Remeshing, Simplification and Reconstruction → Simplication : Quadric Edge Collapse Decimation (with texture)" ![]() "Filters → Remeshing, Simplification and Reconstruction → Quadric Edge Collapse Decimation (with texture)" ![]() the version of Meshlab you used is Meshlab_64bitv1.3.3 - the latest version is Meshlab 2016.12 and the menu entries are slightly different, which initially stumped me - as there is no entry in Meshlab 2016.12 of Thanks James for the article - this helped me successfully to reduce my image size - however a couple of pointers for anyone else wishing to reduce the file sizes for uploading to Sketchfab and avoid the minor difficulties I encountered :-ġ.
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