Just quicky try without any precision (just for the concept) but maybe that could be work :)

With more attention to the orientation and size of circles )
In fact that is not a verygood idea :D

Just a little question : When an arc is "extended" to a boundary object : it's an always an arc or a certain tangent line from the existant arc toward the boundary object?

Ps Very sinuous grooves Michael and tricky tip ! :)

Hello Michael,

Thanks for your reply. I think I understand your method but will try later today to see it for myself.

Originally the outer shell of my inhaler was closed. However, after the sinusoidal cut and bevel (rounding) I deleted the side surfaces were the inner part of the inhaler is located. Perhaps the boolean method would have worked if I had applied it earlier in my modelling process. I will try to remember to do booleans preferably with closed surfaces.

I can imagine that the double surfaces were created in the modelling process as sometimes I did not understand exactly what happened during a trim or boolean.

Yours sincerely,

Ray Deleu.

I added two renders of objects created with MoI, rendered with C4D 6+.

> I think I understand your method but will try later today to see it for myself.

Sounds good, please let me know if it doesn't seem to work right.


> I can imagine that the double surfaces were created in the modelling
> process as sometimes I did not understand exactly what happened
> during a trim or boolean.

I think that something may be duplicating things in an unexpected way. Anyway, if you happen to notice this happening during a modeling session, please let me know.


> I added two renders of objects created with MoI, rendered with C4D 6+.

Looks groovy! :)

- Michael

Other than that, it looks like you may be running into a problem where the boolean operations don't quite work as expected right now when one of the objects involved is an open surface instead of a closed solid.

Yes, I can confirm this. I was trying to make a threaded screw. I swept a circle along a spiral curve, then tried to subtract it from a cylinder. But, when I tried to do the boolean, it didnt work. I looked at the ends of my sweep, and they where open. I selected the ends and closed them with 'planar'..then the boolean worked perfectly.