To help mix things up in my concepts, I have approached these designs differently using the software Alchemy - a drawing application designed to be widely experimental in nature. These tribe mask designs were made using loose abtract forms and shapes combined with the use of the mirror function.
I had some fun with these as I let go of concerns such as detail or line. While these are not final, they serve as initial musings that may have potential to be explored and developed further.
If you're interested in using Alchemy, you can download it here - its free and there's no need for installation as it runs independently.