gharryh schrieb:
> For a test i am constructing a inc that contains some profiles.
> Now i want to create a rounding between two boxes to visualize a smooth
> transition between these two surfaces.

For rounded concave edges, you'll need to add another box with square 
cross-section in that corner, then cut away from it using "difference" 
with a cylinder (make sure it's a bit longer than the beam, so you don't 
get a "coincident surfaces" problem at the ends).

For rounde convex edges, you'll need to subtract a box from the corner 
(again make sure it's a bit longer than the beam), then fill it up with 
a cylinder.

As this will quickly increase the complexity of the shape, I'd suggest 
using a prism object (with a linear spline) instead of a bunch of boxes 
and box-cutouts, and finally just add/subtract the cylinders. Or, 
depending on your requirements, you may even be able to get away without 
the cylinders by just approximating the curves with a number of straight 
line segments - in that case you only need the prism object.

Alternatively, you might try taming one of the other spline-types to 
make the whole rounded-off profile out of a single prism.

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