Will it work without errors if I remove the parallax?
Edited: Tried. When downloading from GitHub (without parallax), there is no FPS drop, but a black square appears in the textures of the ship + when the planet approaches, they change their textures. If you download from CKAN, then the fps is low with and without parallax.
Another point: With an increase in the quality of textures, the FPS increases (paradox), but the same square appears in flight, and probably because of it - low FPS https://imgur.com/k3oLQ04