How do you locally rerender an image after changing settings

I learned this somewhere and forgot how I did it. I did it in the renderer window by dragging a box over the part I wanted redone. It’s incredibly useful tool when you change a shader and don’t need to redo the entire scene. Help.

Re: How do you locally rerender an image after changing settings

You mean when your it renders the place that your mouse cursor is over?

Re: How do you locally rerender an image after changing settings

It’s not the mouse chasing tool. It’s similar though. You can drag your mouse over a part of the previously rendered image and it redoes just that section.

Re: How do you locally rerender an image after changing settings

the RenderWindow command