Hi Lish, use Blend to create a new piece that makes a smooth connection in the empty space between 2 existing pieces. You can use it on either curves or surfaces.

Use Fillet when things are actually touching one another - Fillet will trim back areas to make space for the radius that you request.

Blend is used when things are not touching but you wish to connect them together.

Here are some examples:











Network is used to create a surface from a grid network of curves. It is similar to loft, but basically does a loft simultaneously in 2 directions, so you can gain additional control over the shape.

See here for some more info on Network:
http://moi3d.com/forum/index.php?webtag=MOI&msg=774.2
http://moi3d.com/forum/index.php?webtag=MOI&msg=618.2

Hope this helps!

- Michael

Hi Michael....

Your explanations very help.
I am sorry, I have another related question.
Please see image below :

Hi Lish - that was created using Construct / Loft.

I didn't use a guide for that one - in MoI the Loft command is for creating a surface through cross-sections without any additional guide curve. Using a guide curve as a path in MoI is called the "Sweep" tool instead of Loft.

Here are the steps - first I drew 3 curves in the side view (I used the Right view this time), using Draw curve / Freeform / Control points:



Then I switched to the 3D view so I was looking at the curves like this:



Then I dragged the curves apart to position them:



Then select all 3 curves and run Construct / Loft:



The hole was cut by drawing an additional curve in the front view and then selecting the surface and running Edit/Trim to cut the surface with the new curve.

- Michael