Can't Get Loft to Work for Carved Top Guitar

[evanDXG2P]

Sketches 14, 15, and 18 form the profile, center profile line and rails. I cannot get the loft to happen no matter how hard I try. I have attached. What am I doing wrong?

[davebYYPCU]

What am I doing wrong?

Not surprising.

Loft is finicky, and proper preparation is mandatory.

Sketch 14 has noting usable in your loft.

Sketch 15 is a single profile,

Sketch 18 has all the construction for the loft in it, including a near copy of sketch 15, and it is a 3d sketch.

Are you intending to make 2 sides down the centre line?

Contours at the neck, may not work well.

2d Sketches are recommended, one per profile, and another for Rails, unless they connect at a common point, then they will need a separate sketch, for one shot Lofting.

Some guidelines, 

Loft to point is not recommended

Rails can not connect to the same profile more than once

Rails must be coincident connected to the profile.

Best to describe what you were thinking that would work, 

Might help....

[TrippyLighting · Accepted solution]

This isn't a single loft!

Just as with every other design the surface needs to be "broken down" into several individual patches, isolating areas of high curvature from areas of low curvature.  you might be able to create "some" geometry attempting to do this in a single loft, but most likely the quality of the surface will not be adequate and you will most certainly not have a lot of control over the shape.

It might be easier and provide better control to create this using T-Splines. 

I would most certainly not try to loft from curves with such bad curvature. That broken curvature is very likely due to you using an offset spline. As a much better alternative, extrude a surface and offset that.

[evanDXG2P]

I did multiple lofts and was able to get what I needed. Thanks, Trippy!