I have been struggling creating a surface where ı highlighted in the picture and you can find the 3dm file. I tried patch it helped me to get surface which looks as close as what ı wanted to have but it is not smooth first and second not tangent to the other surfaces where it is supposed to be. Can you help me about how ı can get that perfect surface ?
If you match all three G2 identical (same CP distances to chamfer angle helper surface and chamfer), or if you do one and then copy/rotate to obtain the other two, they will inevitably intersect (the entire thing is symmetrical after all). The “high point” thus emerges by itself, very similar to a round G2 corner or a round corner with equal setbacks. You can then match the curves a bit differently to move the “high point” in or out a little bit (there is leeway).