LOS ANGELES — A joke making the rounds online involves a pair of red and green glasses and some blurry letters that say, “If you can’t make it good, make it 3-D.”

The fans of flat film have a motto. But do they have a movement?

While Hollywood rushes dozens of 3-D movies to the screen — nearly 60 are planned in the next two years, including “Saw 3-D” and “Mars Needs Moms!” — a rebellion among some filmmakers and viewers has been complicating the industry’s jump into the third dimension.

It’s hard to measure the audience resistance — online complaints don’t mean much when crowds are paying the premium 3-D prices. But filmmakers are another matter, and their attitudes may tell whether Hollywood’s 3-D leap is about to hit a wall.

Several influential directors took surprisingly public potshots at the 3-D boom during the recent Comic-Con International pop culture convention in San Diego.