i'd like to know how to remove **PTGUI's black circle holes** when converting an already flat 360 pano to **Equirectangular QTVR / Cubic**.

 I do understand that the Top & Down generated images have those holes since they are curved to fit the dimensions, yet I still thought to ask here since I already have 6 cubic faces and there is no black hole in their top down and I have no idea how to do that in PTGUI.

thanks.