Photogrammetry software like Meshroom allows users to create 3D models from a series of 2D images. Once the model is processed and reconstructed in Meshroom, users may want to export the 3D model as an OBJ file for use in other applications. Here's a step-by-step guide on how to export Meshroom as OBJ:

1. Open Meshroom and load the project containing the 3D model you want to export. Make sure the model is reconstructed and textured properly.

2. In the Workspace window, navigate to the NodeGraph and locate the node representing the final reconstructed 3D model. This node may be labeled as MeshFiltering, Texturing, or similar, depending on the specific workflow used.

3. Right-click on the node representing the 3D model and select 'Export as OBJ' from the context menu.

4. Choose a destination folder and enter a file name for the OBJ file. Click 'Save' to export the 3D model as an OBJ file.

5. Once the export is complete, navigate to the destination folder to locate the exported OBJ file. The file can now be used in other 3D modeling or rendering applications.

It's important to note that the size and complexity of the 3D model may affect the time it takes to export as an OBJ file. Additionally, some post-processing may be required in the exported OBJ file to optimize it for specific applications. By following these steps, users can successfully export 3D models from Meshroom as OBJ files to incorporate into their 3D projects and workflows.