Hi together, For general sweep surfaces, we provide the type FSweepSurface but also the transformation FSweepTransformation, which is more powerful: With this transformation, you can control the shape of the swept surface (=>meta surface) along the path with your own functions for each profile parameter. If you want to use this transformation and you need to match a start and end profile, then please find attached an example where two sweep transformations are merged in a single meta surface. We simply fade from one definition into the other one by using two curve engines in a single meta surface. The attached project still contains the intial setup, from which a feature definition was created (from selection) - in order to encapsulate the two sweeping profiles. Just set the scope "01_..." to visible if you like to have a look at it. Cheers Joerg SweepTransformation.fdb