It is possible to install Brilliant Controls in a "3-way" configuration with a regular rocker as the "other" switch. Please reference the wiring diagrams below to see how to wire your Brillant Home Control with a regular rocker.
Brilliant Control 3-way Wiring Guide - Line side Rocker
Brilliant Control 3-way Wiring Guide - Load side Rocker
Brilliant Control 3-way Wiring Guide - All Controls
3-way Wiring Guide - Line Side Rocker
Gangbox with pigtails
Gangbox without pigtails
3-way Wiring Guide - Load Side Rocker
Gangbox with Pigtails
Gangbox without pigtails