Substance Painter is a powerful 3D painting software that allows you to easily texture and render 3D models. One of the key features of Substance Painter is its ability to import OBJ files, which are commonly used for 3D models. Here's a step-by-step guide on how to import OBJ files into Substance Painter. Firstly, open Substance Painter and create a new project or open an existing one. Then, go to the 'File' menu and select 'Import'. Choose the OBJ file you want to import from your computer and click 'Open'. Substance Painter will then import the OBJ file and display it in the 3D view. You can now start texturing and applying materials to your OBJ file in Substance Painter. By following these simple steps, you can easily import OBJ files into Substance Painter and take advantage of its powerful texturing and material application capabilities.