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In developing the look of Kashyyyk, the Art Department first turned to the much-maligned 1978 television special to see what had come before. "We watched that on a loop about four or five times, avoided suicide, and went back to work," laughs Church. Though produced on a variety show scale, the Holiday Special's Wookiee world (then called Kazhyyyk -- pronounced, oddly, as 'Kazook') did have an establishing shot of a Wookiee domicile rendered as a painting by Ralph McQuarrie. The set built for the show -- the inside of Chewbacca's home -- was a mix of flashy sci-fi tech and carved-from-wood naturalism.
So, the Holiday Special is still in the minds of the Lucas-ites, as much as some might say that Lucas tries to distance himself.