So that's why if you want something to look like one single smooth sheet, it is a good idea to model it that way too, as one single surface command instead of building it in little separate pieces.

However, it is not good to take this to the extreme and try to build your entire car out of one single surface either - when pieces change in shape quite a bit you will definitely need to try and find some natural divisions between different sections because it tends to be too hard to control a really huge detailed surface that has a lot of variation in it in one single surfacing command.

But for an area where it seems like one logical more broadly smooth piece, like your canopy part there, then that is a good candidate for building as one larger surface.

- Michael