It all depends on what you’re working on. If you’re just making a still image, you hit render once and you’re done, you’re like well 4 seconds, big deal. But then if you’re working on an animation of a flyby of a room on a house, and you have to render 1,000 frames, you are saving 4 seconds per frame, that’s 66.6 minutes you are saving, so over an hour of render time. And animations can have thousands of frames. And then if you have not one but various portals throughout your scene, say you have 4 rooms and you are saving 4 seconds in every room you render, now that’s 16 seconds of render time you’re saving. And if you have to do a 1,000 frames animation and you’re saving 16 seconds per frame, that time saver shoots up significantly.
