As the name implies, Boundary Boss/Base is used for creating solid material with the boundary feature and is the "solid" equivlent of the Boundary Surface; in otherwords, if you want to create a solid boundary feature - i.e. two closed profiles for the 1st direction, then you use the Boundary Boss/base feature verses the Boundary surface. Boundary Cut is, as the name implies, a creating a boundary feature for the purpose of cutting.
Thanks Mark, do you have any real sample (3D model) of boundary ?? It would be great for me to better understand.
I asked you to be my friend !
Was it good the San Diego Solidworks 2012 Convention ??? I wish I were there...
Boundary solid is like a loft, but works better. You need multiple profiles (sketches), and the feature will interpolate the shape between the profiles. You can set end conditions like normal to profile to control the shape, or you can add guide curves. In the example below, I made a rectangular sketch and a circular sketch, and you can see that the Boundary feature creates intermediate profiles changing the shape from square to round.
Loft features can do some things Boundary can't, like centerline loft (centerline is a guide curve that doesn't touch the profiles), and closed loop loft without a closed loop guide curve.
If you're a beginner to complex shapes, there isn't much of a difference between the two.
The Boundary solid isn't really used that much in comparison to the Boundary surface. At least in how I use them.
Finished part using the feature above, including feature manager:
Thank you Matt !!!! Could you send me the 3D model of that sample, please???