What will happen if you don’t render your sequence after applying Optical Flow?

When you apply Optical Flow to a clip in Premiere Pro, the software uses algorithms to create new intermediate frames between existing ones, allowing for smoother slow-motion effects and transitions. However, this process requires rendering to visualize the effect properly in the timeline.

If you do not render your sequence after applying Optical Flow, the effect will not be visible in the program monitor. Instead, you will see a placeholder or a simple representation of the clip as it was before the effect was applied, which means you won't observe the enhanced fluidity or changes the Optical Flow is intended to provide. Thus, rendering is essential to see the results of any complex visual effects, including Optical Flow, as it processes the data to generate the final visual output.

This context highlights the importance of rendering in the editing workflow to ensure that effects applied, particularly those that change frame rates or create new frames, are accurately represented in your editing environment.