I think I found a way to make raised bead embroidery easier and more consistent using pieces of craft foam. The foam can be cut using paper punches or scissors, then layered to add as much height to your bead embroidery as you wish.
by offthebeadedpath
by Stringshine
by Hand embroidery
by Aham Designer Boutique
by Stitch and Flower
by Shehla_kanwal
by SR Embroidery