Looking upward in the fantastic space of the Hall of the Abencerrajes in the Alhambra Palace..
(From Andre Paccard: "Le Maroc et l'Artisanat Traditionnel Islamique", 1983, Paris)
Since such an extensive muqarnas ceiling would be quite heavy,
light wooden panels with stucco painting are probably hung from the roof.
The chart below shows wooden pieces constituting a Muqarnas.