As ugly for the performers to look at, as for the spectators who enterwhat should be a magical space.
请问老师：
1. 这里的 As ugly for theperformers to look at 是否等于 as for theperformers, to look at sth. they may feel ugly？
2. the spectators who enter what should be a magical space 是主语从句，主语是 the spectators who enterwhat 这里的what就是表示the space，为了预防重复所以写了what？
谢谢老师!
你对句子结构的理解完全错了。
这不是一个完整的句子，只不过一个形容词短语。整个句子结构为： as ugly for A as（ it is） for B.
for the performers to look at 为悬空不定式复合结构作ugly的补足语，省略的主语为look at的逻辑宾语。（ugly作表语，允许其后的不定式为悬空不定式（反射不定式）
for the spectators 为as比较分句的状语，对于...而言。whoenter what should be a magical space 为the spectators的定语从句，其中what should be a magical space为名词性关系分句作enter的宾语，what=thething which.
