Hi,
Currently "Convert to cube faces / QTVR" save uncompressed TIFFs.
Please add compression options like in "PTGui Create Panorama" tab.
I use full 360x180 equirectangular projection for gigapixel panoramas because there are no distortions and easy to view in Marzipano.js.
Example:
So, a big part of my TIFF is black (transparent). Black parts is well compressible i.e. for LZW compression. Then after converted to cube faces TIFFs I must resave each face in Ps with compression for save disk space.
--
Best regards
Michał Niedźwiecki