Meshroom is a powerful photogrammetry software that allows you to create 3D models from photographs. Once you have processed your images and created a detailed 3D model in Meshroom, you may want to export it as an OBJ file for use in other 3D software, games, or 3D printing. Here's how to do it:

1. Open your project in Meshroom and make sure the reconstruction and texturing processes are complete.

2. In the Workspace panel, navigate to the Texturing node and click on it to select it.

3. In the Parameters panel, look for the 'Texture & Maps' section and find the 'Export Textured Mesh' option.

4. Click on the '...' button next to the 'Export Textured Mesh' option to specify the file path and format for the export. Choose OBJ as the file format.

5. Click 'Export' to save the textured 3D model as an OBJ file to the specified location on your computer.

Now you have successfully exported your Meshroom 3D model as an OBJ file. You can use this file in 3D software such as Blender, Maya, or 3ds Max, or 3D printing software to further edit, animate, or 3D print your model.

It's important to note that when exporting your Meshroom model as an OBJ file, you may also want to export the accompanying texture maps (such as the diffuse, normal, and specular maps) to maintain the full visual appearance of the model in other software. These texture maps can be exported from the same 'Texture & Maps' section in the Parameters panel.

In summary, exporting your 3D models from Meshroom as OBJ files is a straightforward process that allows you to take advantage of the detailed and accurate models created through photogrammetry. Whether you're a 3D artist, game developer, or enthusiast, knowing how to export Meshroom models will give you the flexibility to use your creations in various applications and industries.