I was lucky enough to visit Y's Arts just as Yokko (Yoshihiko Tsutsumi - つつみよしひこ) was about to pack up some intriguing Dual-Perspective Paintings to ship to an overseas venue. The artist explained how he began painting on the back of the translucent material with the visualized perspective of standing in front of it, and then gradually brought his perspective around to the back and refocused on the work from that perspective. The result of this dual-perspective process is basically 1) A painting viewed through the translucent material, 2) a painting viewed conventionally, and 3) a stained glass effect with back-lighting. It was quite interesting to experience! I give a similar explanation in this video, taken at the artist's studio.
Video taken in artist's studio, explaining concept while artist shows front and back of a few of his Dual-Perspective Paintings:
Ginza Y's Arts-101/508
Lyle (Hiroshi) Saxon