Color infill in striplogs

[d.campbell13]

The options available for plotting P-data (in my case wireline log data) allow you to plot L to R (min -> max) and R to L (max -> min), but it appears that the colour infill or gradient infill is always on the minimum side of the curve. Is there any way to fill in the opposite side of the curve? This convention is common when correlating gamma ray curves.