Here I have a transparent mask layer which highlights an area of interest by making the basemap outside the area of interest a lighter color.
What I'd like to do is have the masking layer change the basemap to grayscale outside the area of interest. Is this possible?
The basemap is Bing Satellite. I'd rather not get into downloading the basemap, converting to raster, clipping the raster, etc. etc. I'm hoping for a graphic solution.
My question is related to and inspired by this question.