To create a storage asset, go to Asset->FLuXY->FluxyStorage.
Maximum amount of texture memory that can be allocated by this storage asset, expressed in megabytes. Note this does not account for density supersampling.
Format used to create density and velocity textures, respectively. Can be Fixed (8 bits per component), Half (16 bits per component) or Float (32 bits per component). "Half" yields the best performance-quality compromise.