When playing Ars Nouveau the floating items on top of pedestals (used for various rituals) won't render if starlight is being used. Ars Nouveau's developer's theory was something about how item entities are handled in Starlight.

It's not a critical incompatibility but it does make performing rituals a fair bit harder since there's no way to tell what you have where but pure blind memory.

Starlight doesn't affect item entities.