VIDEO TUTORIAL: How to compress / reduce the size of an industrial 3D CAD model with MeshLab and Blender?
Tutorials | 05/06/2025 |
Discover the techniques to enhance your AR Code experience with optimized 3D models. Previously, we shared a tutorial on using Blender to reduce 3D model file sizes, ensuring efficient rendering. For high-definition static CAD models, explore this alternative approach for superior AR presentation.
Our process supports an array of 3D CAD file formats, such as STL, OBJ, STP, IGS, OFF, GLTF, GLB, WRL, BREP, XBF, PLY, MSH, PNG, LOG, ES, 3DS, QOBJ, PTX, VMI, PTS, APTS, XYZ, PDB, TRI, ASC, TXT, X3D, X3DV, FBX, BRE, DAE, and E57.
Understanding Industrial 3D CAD Models
In the world of Industrial & Manufacturing, Computer-Aided Design (CAD) plays a crucial role by offering high-definition 3D modeling for parts and assemblies. Crafting these models requires sophisticated 3D CAD software, including Fusion 360 Autodesk, Solidworks, CorelCAD, AutoCAD, Tinkercad, FreeCAD, SketchUp, Solid Edge, Bentley, LibreCAD, SOLVESPACE, BRL-CAD, QCAD, IRONCAD, PTC, CATIA, OpenSCAD, Rhino, and Siemens NX.
Reducing the Size of Industrial 3D Models
Follow our comprehensive guide to lighten CAD 3D models for augmented reality using AR Codes. Start by minimizing model vertices in the design software. If needed, apply our proven method using CAD Assistant, Meshlab, Blender, and Gimp:
Step 1: Convert Non-Annotated Models with CAD Assistant
Leverage the free 3D CAD converter, CAD Assistant, suitable for personal and commercial applications. Download at https://www.opencascade.com/products/cad-assistant/.
Import your model and export in .OBJ format, setting the stage for subsequent steps.
Step 2: Decimate Your 3D Model with MeshLab and Blender
Decimating reduces model vertices, but be cautious of potential texture defects. Frequent render checks post-decimation are advised. Utilizing both MeshLab and Blender offers the best results, with MeshLab excelling in static model decimation.
Decimation with Blender: (https://www.blender.org/download/)
- Import your 3D file (compatible formats include GLB, GLTF, DAE, ABC, USD, BVH, PLY, STL, FBX, OBJ, and X3D)
- Decimate each mesh aiming for fewer than 40,000 faces. Use Meshlab if UV holes appear.
- Export in *.glb format, applying modifiers but skipping compression.
Decimation with MeshLab: (https://www.meshlab.net/#download)
- Import 3D formats like ES, 3DS, PLY, STL, OBJ, and more.
Choose based on texture presence:
- Textured: Apply 'Quadric Edge Collage Decimation' with texture.
- Without texture: Use 'Quadric Edge Collage Decimation'.
Ensure your model retains quality by setting the face count appropriately.
Export in *.obj format to include textures.
Step 3: Compress Textures with Gimp
If your model contains textures, follow these steps:
- Import model into Blender, exporting in .gltf + .bin + textures.
- Open texture files in GIMP.
- Scale images (recommend 1024x1024) for optimal compression: Image > Scale Image.
- Export as *.jpg with resolution 90 (or lower for enhanced compression): File > Export as.
- Edit the .gltf file to update texture formats (e.g., ".png" to ".jpg") and save.
Step 4: Convert Your Model to .GLB for AR Code Upload
Final conversion steps:
- Import .gltf model into Blender.
- Consider a Blender decimation post-MeshLab if needed, as detailed in Step 2.
- Export in *.glb format, applying modifiers without compression.
Upload your 3D model effortlessly to the AR Code platform.
Enhance Your AR Experience with AR Codes
AR Codes offer a transformative way to engage digital content, with immersive interactions found in features such as 3D File Upload. From AR Photos to AR Videos, the possibilities are endless. Start creating unique AR experiences today with our free trial.
Video Tutorial: Reduce the Size of a CAD 3D Model
Watch this instructional video to master reducing 3D model sizes using Blender and Gimp, covering every step with precision.
AR Codes' 3D Modeling Tools
Immerse in interactive digital content with AR Codes, utilizing advanced 3D modeling tools. Explore limitless features including AR Portals and Object Capture. Engage and explore creativity with AR Face Filters, AR Logos, and more.
Frequently Asked Questions
What are industrial 3D CAD models and why are they used?
Industrial 3D CAD models are precise representations used in industry for visualizing, planning, and simulating products and systems. High definition is crucial for production, with designs crafted in specialized software like Fusion 360 and Solidworks.
How can I convert my 3D model using CAD Assistant?
CAD Assistant provides a free, versatile conversion tool for both personal and commercial use. Obtain it at https://www.opencascade.com/products/cad-assistant/, and easily convert models to .OBJ format for further steps.
What is 3D model decimation and why is it important?
3D model decimation reduces vertices to decrease files size, essential for optimal AR display. It must be balanced to avoid definition loss, ensuring smooth model rendering.
How to compress the textures of a 3D model with Gimp?
Using Gimp, compress textures by scaling and converting formats for better performance. Begin by exporting your model from Blender as .gltf + .bin + textures, then use Gimp to adjust image sizes and formats for efficient compression.
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