Ultra-realistic 3D Visualization of Four Mechanical Keyboard Keycaps Arranged Tightly

Render an ultra-realistic 3D visualization of four mechanical keyboard keycaps arranged tightly in a 2x2 layout, each one making contact with its neighbor. The perspective is a slightly angled isometric view. One key is frosted transparent with "clear" printed in bold white text. The remaining three are charcoal gray, teal, and ivory. One key displays the Discord logo, while the other two are labeled "push" and "go". The keycaps feature a matte plastic finish, gently curved tops, soft shadows, and are set against a minimalist pale gray background.