Hi there, I am extremely new to Rhino, and also with using surfacing.
I have managed to draw up this kayak, but I desperately need to convert it to a solid with a thickness of 6 mm.
the outside needs to stay exactly as it is, only the inside needs to change.
i was able to join it all.
I am in panic mode now, because my project is due in a few days
I’m not sure what you mean by that. I didn’t see the inside surfaces in this model.
But first things first. You will have to change the outside if you want this model to be a solid. It looks like you started with one half of the kayak hull and then mirrored that. The first half didn’t have a planar opening, though, and therefore the two halves do not join up into a closed polysurface.
If you run the DupBorder command on the hull, you will see where it is open. In this picture that are the green curves:
If you go back to the basic untrimmed hull shape and look at the border curve on that one you can zoom in and see that it doesn’t lay on the XZ construction plane: