hi everyone I am actually working on my first video game using Babylon.js. This engine is so cool ! But I have a little problem with a sprite.. http://www.peru-lab.com/quetzal/level1# In this level there is a blue star in the cosmos, and I would like to reveal informations about this star just using a rollover with the mouse I already created a sprite for the star and another sprite for the informations but I don't know how to reveal it with a simple rollover here is the code i use for the two sprites : var spriteManagerPlayer = new BABYLON.SpriteManager("playerManagr","center_galaxy.png", 2, 320, scene); var player = new BABYLON.Sprite("player", spriteManagerPlayer); player.position.y = -100; player.size = 2; var spriteManagerPlayer = new BABYLON.SpriteManager("playerManagr","hud_1.png", 2,60, scene); var player = new BABYLON.Sprite("player", spriteManagerPlayer); player.position.y = -99; player.size = 1; then, I didn't find any information in the documentation about sprites' rollover animations/actions Could you help me please ?