Steaming hot coffee in a completely transparent glass cup on a dark moody background, Octane Render 1.2, GPU Path Tracing, Spectral rendering, ultra photorealistic, realistic rising steam, rich dark coffee with crema, perfect glass material with stunning caustics and light refraction, dramatic side lighting, cinematic atmosphere, shallow depth of field, luxurious and elegant mood, extreme detail, 8K, Octane Denoiser, MaterialX, OpenPBR