@ : i liked a lot your if/when, so i’ll do my best to make it being a when ^^
@Loucsam : I used the “grid maker” shown by Ian Shadden : Procedurally Generated Map Lag - Blueprint - Epic Developer Community Forums to spawn squares on which i have added an overlap box and do my over event in square Bp. (at first i had an instanced one but as i couldn’t use each square except for destroy i finally used a “spawn actor on begin play”) then used or square or character.