how to render segments for preview in blender 2.72

render part of a image for preview in blender

hi, in this tutorial we see the way to render only a portion for preview and save time , this is very helpful especially for cycles.


first, we need a scene to render ,i will render this scene .
by pressing 0 on your numpad we go into camera view , in camera view by pressing control+B select just the area you want to render inside the camera view

go to render tab and click render or just hit F12 to render

to leave the area render we can do it by pressing control+B out of the camera view

 
that's all, now we have render only a segment of the image and this is very helpful for prview  especially for cycles.

thanks you.