Many thanks to PixelForest for this amazing tool! I unfortunately encounter a bug when using ortho mode. The paintable surface is masked by a blue square (see picture attached with the example of the giant turtle), and I couldn't find any way to make it disappear. When I quit ortho mode, the blue mask is no longer here. I'm running FlowScape on Windows 10.
Sorry if this has been answered before, I haven't been able to find anything regarding this issue.
Thanks in advance!