In high-end VFX, 12-36 hours (wall clock) per frame is a roughly accurate time frame for a final 2k frame at final quality. 36 is at the high end of things, an

In high-end VFX, 12-36 hours (wall clock) per frame is a roughly accurate time frame for a final 2k frame at final quality. 36 is at the high end of things, and the histogram is more skewed towards the lower end than > 30 hours, but it's relatively common. Frames can be parallelised, so multiple frames in a shot/sequence are rendered at once, on different machines.