In 99.99% cases we laser cut one layer at the time. It is much easier to manage fabric on a laser cutting table and it is easier to control laser for clean cutting. Also, in many cases some fabrics will fuse to each other, due to the hot laser cutting that will melt and fuse fibers together.
Laser cut fabric
Laser cut lace
Laser cut fabric panels for the Art Basel Miami Show
Laser cut material
Clean laser cut
Fraying fabric
Laser cutting is very beneficial to prevent fraying.