Houdini is a powerful software for 3D modeling and animation, and if you want to share your projects with others who may not have Houdini, exporting them as OBJ files is a great option. Here's how to do it.

Step 1: After completing your 3D model or animation in Houdini, make sure everything is properly positioned and textured.

Step 2: Go to 'File' in the top menu and select 'Export' from the dropdown menu.

Step 3: Choose 'OBJ' as the file type you want to export. This will create a .obj file along with an .mtl file for material information.

Step 4: Name your file and choose the location where you want to save it.

Step 5: Click 'Export' and your Houdini project will be saved as an OBJ file.

Now you can easily share your 3D models and animations with others, and they can open them in various 3D modeling and animation software. Remember that OBJ files only save geometry and material information, so if your project includes special Houdini features, they may not be preserved.