Thanks for your comments! Yes, they're blends. Teyon has explained it better than I could, it's basically the way you join different surfaces with a smooth transition between them, either in tangency pr curvature. It's very useful to attach arms or legs to a body, or when you need to add extra details to some part of the model without having tons of isoparms spreading all over the model, like I did with the eyes. I'll keep you updated with new WIPs.