Tutorial to convert a 3D mesh from `.usd` to `.obj` using Isaac Sim
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Overview
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This tutorial walks you through the steps to convert a 3D mesh from USD generated from NVIDIA Omniverse to OBJ using Isaac Sim.


Tutorial Walkthrough
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1. Install and launch Isaac Sim following the steps in the :doc:`Isaac ROS Isaac Sim Setup Guide </getting_started/isaac_sim/index>`
2. Click on File -> Open and select the `.usd` file:

   .. figure:: :ir_lfs:`<resources/isaac_ros_docs/concepts/pose_estimation/foundationpose/usd_to_ob_open_usd.png>`
      :width: 600px
      :align: center

3. Click on the File -> Export button and select `OBJ File`` from the drop-down menu:

   .. figure:: :ir_lfs:`<resources/isaac_ros_docs/concepts/pose_estimation/foundationpose/usd_to_ob_export_1.png>`
      :width: 600px
      :align: center
   
   .. figure:: :ir_lfs:`<resources/isaac_ros_docs/concepts/pose_estimation/foundationpose/usd_to_ob_export_2.png>`
      :width: 600px
      :align: center

4. A pop window that shows the export options should show up. **Only** select or check the `Export Materials and Textures` and `Export Visible Only` options:
   
   .. figure:: :ir_lfs:`<resources/isaac_ros_docs/concepts/pose_estimation/foundationpose/usd_to_ob_export_3.png>`
      :width: 600px
      :align: center

5. You should see the `.obj`` file along with the `.mtl` and texture `.png` files in a folder.