Substance Painter is a powerful tool for 3D texturing and modeling, and importing OBJ files into Substance Painter is a crucial part of the workflow. Here's a step-by-step guide on how to import OBJ in Substance Painter.

1. Open Substance Painter: Launch Substance Painter on your computer to begin the import process.

2. Create a New Project: If you haven't already, create a new project in Substance Painter or open an existing project where you want to import the OBJ file.

3. Click on File: In the top menu bar, click on 'File' to open the dropdown menu.

4. Select Import: From the file menu, select 'Import' to open the import options.

5. Choose OBJ File: Navigate to the location on your computer where the OBJ file is saved. Select the OBJ file and click 'Open' to import it into Substance Painter.

6. Adjust Import Settings: Substance Painter will provide import settings for the OBJ file, allowing you to set parameters such as scale, position, and axis orientation. Make any necessary adjustments based on your specific project requirements.

7. Confirm Import: Once you've set the import settings, click 'Ok' or 'Import' to confirm the import of the OBJ file into Substance Painter.

8. Begin Texturing: With the OBJ file successfully imported, you can now start texturing and painting your 3D model in Substance Painter to bring it to life.

By following these simple steps, you can easily import OBJ files into Substance Painter and seamlessly integrate them into your 3D modeling and texturing workflow. Substance Painter's intuitive interface and powerful tools make it a go-to choice for artists and designers working in 3D.