Filmmaker James Cameron has resigned from the board of Beverly Hills 3-D technology firm RealD Inc. due to his heavy workload, the company announced Monday.

Cameron, an early champion of the 3-D format, is finalizing scripts for his Avatar 2 and Avatar 3 films, which he hopes will go into production by the end of the year.

Cameron is also a co-founder of L.A. 3-D technology company Cameron Pace Group, which sells production technology. He expressed his commitment to continue his use of 3-D in future films.

“The increasing demands on my schedule in 2013 have made serving on RealD’s board impractical going forward,” Cameron said in a statement. “However, I am excited to continue my long-standing collaboration with RealD to jointly promote the merits of 3-D filmmaking.”

The company also announced Monday that Laura J. Alber, chief executive at Williams-Sonoma Inc., will join its board.