A User Script to mirror and bake Mari's Paint buffer
Clone/Download the repossitory as a zip file.
Extract the content from the BakeSymmetry-master folder to your .../Mari/Scripts/ directory.
Start Mari and enjoy it.
P.S - In case you close the BakeSymmetry palette, 'Ctrl+Alt+S' will bring it back.
David Eschrich - Original developer
Antonio Neto - Updates contributor
John Crowe - Code refactor