Filling in space between points in a ternary

Hi, I have a ternary ‘scatterternary’ with various points plotted. I’d like to connect and fill in the space between these points. Is there a simple (or any) way to to this in plotly? I guess it would be something like a filled area plot, but I couldn’t find any examples for ternaries. Basically, I need to fill in an area using the outermost points while ignoring the ones inside whatever shape is made. Using mode = ‘lines’ and fill = ‘toself’ just makes a bunch of odd shapes because it tries to draw to each point.