ZBrushCentral

file format for BPR multi renders

Hi,

is it possible to adjust the file format for the different BPR multipasses?

They are psd, OK - but the majority of them must be converted to greyscale before I can open them in Gimp.
After conversion of these initially “multiformat” (as Gimp calls them while refusing to open) files, they can be opened in Gimp.
The conversion itself - allthough simple enough to do - is kind of tedious, and if the format could be altered and/or adjusted in ZBrush …

Thank you.