Dan Rožański released a new pack that features 113 various ornamental alpha masks.
All alpha masks are in 2048 resolution in PSD and TIFF formats and compressed as RAR file for the best compression, Alpha masks can be used within ZBrush, Substance Designer, Substance Painter, Mudbox, and other tools.
Please note that all alpha masks in this pack can be used commercially, by one person. Repacking and reselling are not allowed.
You can learn more and get the pack for $6+ here.