In this Cinema 4D Quick Tip, I demonstrate the difference between the Weld, and the Stitch and Sew tools that are part of the Mesh Menu in Cinema 4D R15. The tools are very similar. I think of the Stitch and Sew tool as an advanced Weld Tool. Using the Connect and Delete feature on separate polygon objects is the key to cleanly welding points together. Using either of these tools is necessary if you want to progress your Cinema 4D modeling skills.