The goal is to create an image like the one below
which was created using
ParametricPlot[{t, t^2}, {t, 0, 1}, Epilog -> Disk[{0.5, 0.5}, 0.09]] but instead of using the Graphics primitive I want to use a Rasterized version of Disk.
Using the commands below, how can I duplicate the result?
bkgd = Rasterize[Disk[{0, 0}, 0.09]]; pplot = ParametricPlot[{t, t^2}, {t, 0, 1}]; It is important that ParametricPlot remain un-Rasterized.
First, you have to define bkgd differently because it's not a disk unless you make it a Graphics first:
bkgd = Rasterize[Graphics@Disk[{0, 0}, 0.09]]; Then use Inset:
ParametricPlot[{t, t^2}, {t, 0, 1}, Epilog -> {Inset[bkgd, {.5, .5}, Automatic, .2]}] 
The position and size of the disk image are controlled by the last three arguments of Inset.
You will note that the last argument (the size scale) is a factor relative to the plot region (with 1 corresponding to the whole width).
