The Riempimento alto e basso / Top and bottom caps dialog box controls the color or image used for top and bottom caps that are added to VR images.  Top and bottom caps allow the user to look up to the zenith (north pole) and down to the nadir (south pole) even if the vertical field of view is less than 180 degrees.

Riempimento alto / Top cap
Click the color well to select a color for the top cap or enter an image file name.  You can use the Sfoglia... / Browse... button to browse for the image file name.

Riempimento basso / Bottom cap
Click the color well to select a color for the bottom cap or enter an image file name.  You can use the Sfoglia... / Browse... button to browse for the image file name.