Surface Modeling Basics and Troubleshooting

 From:  Michael Gibson
4751.2 In reply to 4751.1 
Hi Rogurt, well unfortunately there are a whole lot of potential things that can interfere with filleting. Things like surfaces that fold back over themselves so that they are self intersecting, tiny edge fragments or surface fragments, complex junctures where you have a whole lot of edges coming together to a single shared point, and also just simply not having enough room to fit the fillet in the given space...

The main approach I have for helping people is when you are running into a problem, please post the model file that you are having problems with and that will let me point out the areas within that particular model that are the most problematic.

For staying editable, do you mean being able to turn points on? There is some discussion on that in this FAQ topic here:
http://moi3d.com/wiki/FAQ#Q:_Why_does_show_points_work_for_some_objects_but_not_others.3F

Do you have any example file that you can post where you were having difficulty filleting?

Basically the main thing that tends to help is having a high quality clean and accurate model - there are several ingredients to that, like having pieces line up accurately to one another (make sure to use snaps and don't just eyeball things to be close to one another), and trying to make a more simple structure with fewer surfaces and edges in it instead of having things split up into small fragments that are not necessary.

Usually the base ingredients to have a clean model are in the initial curve framework that you create, so it's very worth it to make sure that you have good quality in those initial curves, because things like curves not being tangent to one another or squiggling back on top of themselves will end up inherited into the surfaces that are generated from those curves as well.

But it is much easier for me to give you some specific advice when it is targeted at a particular model file.

- Michael