During the Rancor sequence in a full frontal shot of it while Luke is trying to find a way out (or any other full frontal shot of it) there’s supposedly a puppeteer’s blue clothed arm visibly operating the Rancor on its left side (right side of the screen for the viewer). While the Rancor’s surroundings are dark, I either need my eyes checked or it just isn’t there .

If anyone else here could try and locate this error and point out where this is visible, would be greatly appreciated.