Hi Laurent,

> The thing is how should i model a watch for example in moi
> to be able to have fillet everywhere it's needed ?

Well actually your posted model is can be filleted as long as you use a small enough radius.

And for a larger radius you were pretty much all ready to do it, you just introduced edge fragmentation by doing some of those partially-sharp-juncture fillets since you only filleted some of the edges that met at a juncture instead of all of them.


So you're actually pretty close there to having the overall technique down well - sometimes the physical geometry of how fillets work can take a bit of getting used to like just the fact that the fillet surfaces from 2 "constant radius" fillets do not necessarily line up to one another when they collide into one another when the surfaces on either side are at different angles to one another.

That's because although all the fillets are made up of arcs of the same radius, when the angle between surfaces changes it will make the fillets to be constructed out of a larger or smaller piece of that same radius arc.

See here for some examples of this geometric situation:

http://moi3d.com/forum/index.php?webtag=MOI&msg=3150.24
http://moi3d.com/forum/index.php?webtag=MOI&msg=2457.2


If you don't have a lot of prior experience with how "constant radius" fillets work, it could be easy to think that any fillet surfaces of the same radius will match up physically where they collide into one another but that's not true. Once you get a bit more familiar with some of these geometric side effects you won't end up doing partial stuff that ends up fragmenting your previously cleanly constructed model so much.

You will certainly still curse at fillets plenty though even when you have more experience, it is definitely a finicky area. But you're not far off from being able to make regular stuff work better....

- Michael