SAN FRANCISCO — A federal judge decided on Wednesday that a wage-suppression class action against animation studios including DreamWorks Animation SKG Inc. and The Walt Disney Co.’s Pixar can move forward as a class action.

In a victory for thousands of visual-effects workers and their lawyers, U.S. District Judge Lucy Koh of the Northern District of California wrote in an 80-page order that plaintiffs in Nitsch v. DreamWorks had met the burden of showing that the issues are common enough to be tried on a classwide basis.