The 3D planetarium of La Coupole, in Helfaut (France), is the 1st planetarium in the World to have a REAL 10K 3D system, achieving a 10K resolution on the meridian, in a 15m digital dome. To achieve this, RSA Cosmos installed the latest version of their astronomical software SkyExplorer 2021 along with 12 x 4K 10 000 lumens VPL-GTZ380 Sony projectors.