Two old doctors walking, wearing full body hazmat suits with glass bubble helmets, snaps fingers, ((inside a realistic human heart chamber pumping with red blood cells, in the style of XVIVO, in the style of Hybrid Medical Animation, in the style of Random42)), extremely detailed, 3D render, realistic, octane render, ultra quality, highly detailed, true light, glare, cinematic lighting, Global illumination, real light, real shadow, hd, 2k, 4k, 8k, 16k