When the production of Finian’s Rainbow moved inside, it tied up two of the sound stages at Warner Brothers. One had the running brook set that was bounded by steep rock walls (they were sealed underneath to keep the water isolated), the other held the bridge, a pivotal setting that set up the ending. One of the stages had a wooden floor which was removable, giving access to more area, allowing them to build up from the “basement.” (Howard Kazanjian- WB had several of this type of soundstage. You chose it normally when you needed to give your set a dual level. If your set was on the stage floor and the stairway went down, you needed to remove that portion of the floor to accommodate the stairs down).
Both sound stages were “greened in.” Even though one had just recently held the forest for Camelot (also a credit for Howard, see previous posts), it was completely revamped – with new trees, bushes, sod etc. Some of the trees and bushes were fake, but the sod was all real. The sod gave a rich green color to the scenes, but like the grass out at Griffith Park it would turn brown too, but for the opposite reason. (Howard – inside the sound stages there was no sunlight – hence no photosynthesis could take place). They kept having to replace the sod. This green turf also meant problems for the actors. It was slippery, and had a tendency to slide out from under the actors, notably during the duet “That Old Devil Moon” between Don Francks and Petula Clark.
Like for these two, the stages were busy crossroads for the other main actors. Fred Astaire’s character, shadowed by leprechaun Steele, buries the pot of gold beneath the sod. The SFX department was called in to give this crock some “magical” properties. It is quite striking to see Fred’s face illuminated by the golden light when he removes it from his carpetbag, prior to burying it. It was a simple effect. (Howard – it was a 100W bulb on a dimmer. The interior of the crock was sanded thin so the light could shine through).
A more complicated effect was put in place for the exchange between Tommy Steele and the antagonist Keenan Wynn. Earlier, Wynn had magically been changed from a white man to a black man, when Petula wished for this, in exasperation at his bigoted attitude. (This transformation was an effect all done with the camera, the soundtrack, the editing, and another use of the wind machine). After Steele encounters the grumpy antagonist in the forest he sets about to cast a spell to make him good on the inside. The pool beside them begins to swirl and “magically” change colors (from green-yellow, to red, to yellow, and back to red again). It was all mechanical and chemical. Howard told me that FX guys built into this pool a mechanical device that set the water in motion – and the colors were from different dyes whose release was governed by a timer. (Interestingly, Keenan’s transformation back to white was executed by a jump cut, a nicely done edit, in one clip he was in blackface, in the second he was without).
Barbara Hancock’s ballet was probably the last thing done on the running brook set. There was a large area nearby above the brook simulating a meadow. Water was sprinkled from above, and an arc light flashed for lightning, as she glissades, jetes, etc in the “rain.” (Howard – the master shot was done in one take, with many pick-up shots and closer shots captured later). It culminated in her character unearthing the buried crock, and another chance for the SFX department to display their wares.