If you're looking to open an obj file in Photoshop for 3D design and editing, you're in the right place. Here's a step-by-step guide to help you open and work with obj files in Photoshop:

1. Open Photoshop: First, open Adobe Photoshop on your computer. Make sure you have the latest version of Photoshop installed to ensure compatibility with obj files.

2. Go to File: Once Photoshop is open, go to the 'File' menu at the top of the screen.

3. Select Open: From the 'File' menu, select 'Open'. This will open a file browser window where you can navigate to the location of your obj file.

4. Choose your Obj File: In the file browser window, navigate to the folder where your obj file is located. Select the obj file you want to open and click 'Open'.

5. Edit your Obj File: Once the obj file is open in Photoshop, you can edit and work with it just like any other Photoshop document. You can apply textures, lighting, and other effects to your 3D object.

6. Save your Changes: After you've made the desired edits to your obj file, be sure to save your changes to preserve your work.

Keep in mind that Photoshop may not have all the advanced 3D editing features compared to dedicated 3D design software, but it can still handle basic 3D design and editing tasks with obj files.

By following these simple steps, you can easily open and work with obj files in Photoshop for your 3D design projects. Whether you're a beginner or an experienced designer, Photoshop provides a versatile platform for 3D design and editing, including working with obj files. Now you're ready to take your 3D design skills to the next level using Photoshop!