Easiest way to add shadow pen to ROI?

[ntj...@gmail.com]

Hi All,

A really neat feature of a PlotCurveItem is its shadow pen, which allows the curve to be easily visible even across dynamic backgrounds. How can I implement this feature for an arbitrary ROI? I was thinking to have two ROIs, where the lower z value has a larger width. Is there a more efficient / better way to get a shadow pen than to link the two ROIs as I have described?

Thanks!