To produce a Bose-Einstein condensate, an optical tweezer traps the atoms in a high vacuum chamber at the focused point of a far-red detuned laser. One originality of our set up is the ability to modulate spatially the position of the highly focused laser beam. The objective of this internship is to develop a new optical bench to improve this painted potential, by extending the technique in 3D. Based on spatial modulation in 2D dimensions using two crossed acousto-optical modulators, it will create a 3D painted potential in a crossed configuration. Special care will be taken about the robustness of the system which has to be compliant with the zero-g simulator. The implementation in the microgravity experiment is planned for a potential Ph. D in the group after the internship.