 "La Marca del Hombre Lobo" was filmed in Jan Jacobsen’s Hi-Fi Stereo 70 3-D format.When Sherman learned this, he was persuaded by other investors to hire optical effects maestro Linwood Dunn to create single-strip, over-and-under 35mm prints for American release.The final results were reportedly beautiful to look at when projected through high-quality 3-D lenses (such as those created by Robert V. Bernier for Space-Vision), but a celebrity-studded Hollywood premiere was completely undone when Sherman’s fellow investors provided shoddy acrylic lenses for the projectors; hence, it was only shown in 70mm 3-D in Germany.