Oil pastels on yellow pastel paper (hence the bumpy/grainy appearance). Couldn't get a better scan than that, it looks much more brilliant and less grainy in person. The yellows are supposed to be golden and orangey yellows, but it was lost in the scan and after playing with the color levels, I still couldn't achieve it in GIMP.
I referenced many of
's paintings for the autumn background. He has very beautiful art!