
Introduction:
I'm really far to be the best 3D designer in the world, so if you have
advice or you know better way to do something, just
email me, I have also much to learn. If you find my english sucks
you can send me back a fixed html page.
Phase 1:Let's start creating a circle over the XZ axes(Object>Spline
Primitive, Circle). To change the default properties of this primitive
double click it's icon in the object list at the right of your screen.
I'm making a 10m radius circle.

Phase 2: Press F4 to change the view, so we have the plan XY view,
now take your cicle that is in the center and drag it the lower side of
the screen. Duplicate it(copy and paste)many times, and every time put
the next circle over the previous one, and change also his position, this
is the skeleton of the tube we're going to create. In my example I have
8 circle, the object Circle is that one at the bottom and the Circle.8
at the top. Now change the view to the XZ axes using the F3 key and move
again in horizontal every Circle.
Phase 3: Let's go to put the life in the circle. First of all you
have to create a Loft Nurbs(Objects>Nurbs>Loft Nurbs) than you must
drag and drop every circle, one after the other in sequence under the
Loft Nurb Object. If you see the picture you can understand what I mean.
Now we know how a Loft Nurbs is, a 3D function that take a sequence of
2D elements(spline) and link it.

Phase 4: Now we have to make some correction to the rotation of
every Circles. As you can see now the tube is not perfect, someone may
like this shape(I like it) but some other may want some perfect tube.
In this case you have to adjust the rotation of the circle, you must rotate
it accordingly to the direction of the tube, the circle must be perpendicular
to the tangent of the curve in that point, you can spend 10/20 minutes
making those corrections(using F3 and F4 views is easy than making it
in the F1, prospective view). I spend only 1 min for my correction because
I don't like perfect shape.

Phase 5: When you've finished trying to adjust your shape, also
in the position of the circles if you need, go to F1 View and move the
prospective to achive the position you like.

Phase 6: Now we're at the Key Point of this lesson. Duplify tre
Loft NURBS Object and move the new one on his orizontal axe. Than duplify
again and rotate it in his vertical axes, than duplify this new one and
move it in his orizontal axes. We have 4 Loft Nurbs and you've understand
the Psycolor file(downloaded about 900 times). An hint, To rotate the
Nurbs you can use your mouse, but be sure to press the right point or
it's a war of UNDO if you try to move in 3D. You can download the source
file, link at the bottom of the page.

Conclusion: Next time well see how to make this object looks better,
we try to understand materials,lights and rendering.

Download
the C4D Souce file.
Please
take 5 seconds for the pool.
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