I would like to convert a panorama (360 x 180 degree equirectangular image) to a rectilinear projection with specific angles and field of view. So far, I am using the droplets to create a viewer and then after adjusting angles and field of view within the viewer, I did a screen capture, but this creates an image whose resolution is limited to the screen resolution. How do I use krpano tools to generate directly the high resolution rectilinear projection?