What causes all of these surfaces to show up? Does it matter? How do i control it? Or keep it under control… I think its happening when i try to join bodies. Does an overlap of joining create new surfaces?
Hi Mike,
It looks like the curves that created the flashlight-bell had a boatload of control points and so made a bunch of thin narrow surfaces when exploded.
Without the file, this is speculation, but the entire bell looks like a series of ~26 surfaces.
Simplify your design curves and you will have fewer surfaces to deal with.
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post a file please - impossible to help without
lovely model >wink< glad to see at least one person watched that video… 
It’s easy in rhino to copy paste a surface on top of another and not know it.
try running the command seldup and see if you have a bunch of identical surfaces pasted ontop of eachother.
if so delete them, and run the command a few more times to make sure they are all gone.
you can also pick a surface and run isolate to hide everything else.
you also may want to explode the model completely before you run seldup as you can actually join an identical surface to itself and create a screwy polysurface that will misbehave in every scenario as you go forward in your model.
post the file and I’ll be happy to peek at it.
happy modeling-
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Right after i posted that i went back and deleted al the faces. nbd. I learned a lot on that video thanks. I am however a bit confused about why that happens. How am i making them by mistake and how do i stop doing that? I’m unclear on when to use the join function and when not to. I’m also a bit unclear on when i have a solid or watertight model or not. How do i check? If i extrude a body into another body intuition makes me want to think the bodies join and that is not the case. Though using join between two bodies also has no effect on the individual bodies. I always end up with copies that are hard to decipher. And im not hitting the “Alt” key ever either.
hard to tell without watching you model a bit-
Think of nurbs modeling like this- you are making model out of paper or rubber sheets… you trim shapes out of them with scissors (the trim tool) and then tape them together to capture volume. (tape is the join command in this scenario)
the showedges command set to naked edges will highlight the naked (unjoined) edges in pink.
once you identify those you can focus in on them and figure out logically what surfaces should join to that edge. you can join to a partial edge by splitting the edge with the split edge (or combine them with merge edge) tools.
feel free to keep asking questions, or post files that you have trouble with. It looks to me like you are doing great and are well on your way to being a very good rhino modeler.
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