Some updates: tested with 6.50.6, up to 16 clients

global entities: GSTNet_ent_create, GSTNet_ent_remove

GSTNet_TrackEntity(my,GSTNet_TrackPos); //send only changed entities
define GSTNet_TrackPos = 1;
define GSTNet_TrackAngle = 2;
define GSTNet_TrackScale = 4;
define GSTNet_TrackFlags = 8;
define GSTNet_TrackFrame = 16;
define GSTNet_TrackSkin = 32;
define GSTNet_TrackAmbient = 64;
define GSTNet_TrackAlbedo = 128;
define GSTNet_TrackAlpha = 256;
define GSTNet_TrackLightrange = 512;
define GSTNet_TrackColor = 1024;
define GSTNet_Trackemask = 2048;
define GSTNet_Trackeflags = 4096;

global effects: GSTNet_effect


more to come ...