@b77
I use it to ensure the minimum separation distance between objects that are being cut on the laser (so that the beam doesn't interfere with local objects). Now that I understand both collision methods, I can use both methods to do this. Depending on materials, I can use collision rotate freely (say a laminate material without any grain - acrylic maybe - where it doesn't matter the rotation of the object) in others that require the grain to be in the direction of the object for strength (wood for instance), then simple collision is ideal.
Being able to ensure that the objects cannot break through the boundary would be very useful as you wouldn't have to re-correct the positions.
It is also superb for manually nesting parts on a sheet as the collider tool rotates parts neatly (paralleled) into place. You can pay huge sums of $$$ for automatic fast nesting software - doing it mandraulically is generally fine for me
BTW, that would also apply to the inside snap where that would be the boundary of the sheet material - ensuring that the parts can't breach the edge of the material itself.
Neil