Exporting lower polycount objs from Rhino to ZBrush is essential for seamless 3D modeling. Here's a quick guide to help you achieve this:

1. In Rhino, select the object you want to export as a low-poly obj.

2. Go to File > Export and choose OBJ as the file format.

3. In the OBJ Export Options dialog, under Polygon Mesh Options, select 'Weld vertices' and 'Refine mesh'.

4. Adjust the 'Maximum angle' and 'Maximum edge length' according to your low-poly needs.

5. Click OK to export the obj file.

6. Open ZBrush and import the obj file by clicking Tool > Import and selecting the exported obj.

7. Once imported, you can start working on your low-poly model in ZBrush.

By following these steps, you can efficiently export lower polycount objs from Rhino to ZBrush, allowing you to create detailed and optimized 3D models for your projects. Happy modeling!