Portrait of an engineer with technical drawings, cinematic close-up with intricate facial details, dramatic three-point lighting, expressive realism and subtle micro-expressions. Inspired by ethereum's decentralized technology and digital currency trends, the portrait captures the engineer lost in thought, analyzing complex blockchain diagrams on a holographic display that floats above their workspace. The lighting emphasizes the engineer's intense focus as they delve into the intricacies of this emerging technology.