I am trying to draw a curved bench around a sitting tub that will be in a wet room. One side of the bench will extend past the glass wall of the wet room. I have tried using poly lines to make a 3D solid, but I cannot get the polylines to close. Attached photos show one more detailed drawing with curved polylines that someone else drew but they are kind of a mess and I can't connect more lines to it to close the shape. The other photo is the inspiration photo and the 3rd photo is the stripped down copy of the CA file that I am trying to work with as a "startover" from the original file. Can someone help or suggest a way to do this?