I've been successful with a couply methods of creating the illusion necklace:
1. Use small crimp beads on either side of the larger bead. But this will give the 'metal confetti' look, which is sometimes very pretty on the necklace.
2. Use 15/0 seed beads in clear or silver lined clear on either side of the main bead. Run the filament through the seed beed, and then loop it around and back through the beed, then the primary bead, then another seed bead with the same loop around it. This will anchor the seeds and the main bead, and the seeds are small enough that most times they aren't noticed.
3. send the filament through the bead, then loop around the bead and back through it.
In the two last versions, you have to be sure you are placing the beads in the right place. Once the loops are pulled tight, the filament will have a noticeable kink in it if you try to move the beads.
Mel