Tip 7: Partial Renders Are Fine
Rendering a 3D scene can take a very long time. After you start a render, an estimate of the remaining time is displayed in the info section at the bottom left of your window. Rendering takes place over multiple passes of the scene, each one refining a little more, smoothing the textures and shadows, and tightening the finished result.
But you don't need to wait for a render to complete! Pressing the Esc key stops a render in process. Even if you're producing a final render, you usually don't need to wait for the progress bar to reach 100% before stopping it. Most often, a render that's 50% complete—or sometimes as little as around 30%—will be adequate for the task in hand, especially if the object is just a small part of a larger scene (see Figure 7). Perfection is often for those with too much time on their hands.
Figure 7 Use the Esc key to stop a render when you're happy with it.