hi , after reading few threads about storing the age of an 'event' over the geometry and getting no real solution ( esp for me , an Escapist , not a Master ); i decided to try with Python . .. so in other words storing birth .. frames in an attribute called 'birthday' , is the main goal here . my idea is this: 1. > to get and write out files for each frame pressing the Play button in timeline ( kind of 'simulation' ). 2. > to process the written files and generate a unique one which p