This looks really cool! Big fan of the style you've achieved here and the direction of the game play. I know next to nothing about 3D but this seems like excellent foray into that space.
You can exit the invisible door without having mask 2 on. Also the collider on the invisible table is enabled when you don't have mask 1 on. These are minor things and I know this is more of a showcase but if you expanded the game play, those might be things to put attention to.
Great work!!