I didn’t spring for the Kingavision glasses and stuck to the 2D version of The Mask the first time around. However, anticipating a re-watch, I realized I had the materials to make my own. I had these gels from Amazon left over from another project. I loosely traced an image of original “The Mask” glasses and made a quick and dirty replica:
Not too comfortable, but for the short 3D segments in the movie, it works! Your mileage may vary.
Here’s a 300dpi png, print at 100% scale on card stock. I cut out a back piece the same shape from blank card stock. I taped the gels down, then glued the two pieces of paper together, sandwiching the gels and the craft stick.