Renderings of Various Futuristic Structures for My Sci-fi Exploration Game

Design an image featuring renderings of various futuristic structures for my sci-fi exploration game with real-time visuals. The image should depict four specific buildings: a research laboratory, a communication tower, an energy generator, and a trading hub. Each structure should be placed within its own square on a transparent background. Render the buildings in a hyper-realistic voxel art style, incorporating depth, realistic lighting, intricate mechanical elements, and a high-tech color scheme that aligns with the game's theme.