Gemini 4 Argon builds a 3D Gothic cathedral scene from one Nano Banana image

Google says Gemini 4 Argon started with a single Nano Banana image and drove Blender MCP in an autonomous loop in Antigravity, sculpting Gothic architecture, aligning camera grids and staging audio-reactive lighting. Google DeepMind says the model iterated on the geometry, textures and lighting to create the finished 3D cathedral scene.