_std/parallax.dm

/var/parallax_enabled	Whether parallax has been enabled or disabled globally.
/var/z_level_parallax_render_source_groups	An associative list of each z-level define and its corresponding parallax layer render source group. See `code\map\map_settings.dm` for the default parallax render sources for each z-level.
/var/area_parallax_render_source_groups	An associative list of parallax render source group types and the corresponding instance of that type.
/var/planet_parallax_render_source_groups	An list of parallax render source group instances that are used within procedurally generated planets.
/proc/setup_z_level_parallax_render_sources	Initialises `z_level_parallax_render_source_groups` by populating it with z-level parallax render source groups.
/proc/get_parallax_render_source_group	Returns a reference to the parallax render source group datum belonging to either an area or z-level.
UPDATE_TESSELLATION_ALIGNMENT	Realigns the parallax layer so that the centremost tessellated tile occupies the position of the tessellated tile closest to the player.

Define Details

Realigns the parallax layer so that the centremost tessellated tile occupies the position of the tessellated tile closest to the player.