Allow an interactive preview of the single current framewhile changing setting

it would be immensely helpful if I didn’t have to render a video before seeing the effect on screen. If you could have a preview checkbox that would turn on immediate application of the model settings to the current still frame of video in the preview window, it would allow me to tweak a setting slightly wait a few seconds and see immediately what the results looks like without having to wait a minute or two between previews to see if the tweak I made was too much or not enough.

Great idea! Voted.