After weeks of wrangling and discussion, the Effingham Industrial Development Authority has given the go-ahead to a massive studioplex’s master plan. IDA members voted 6-0 Monday evening to approve Moon River Studios’ master plan for the 1,560 acres of the IDA’s northern tract at I-16 and Old River Road. The IDA also approved a supplemental agreement to the memorandum of understanding with the studio, but IDA members held off on approving the development schedule.