This announcement does not always bode well for adventurers.
I made over a dozen Halloween themed photos this year, using the program Comic Life, along with adventurer figures from Flying Frog's A Touch of Evil, or monster figures from Wizards of the Coast.
The background is black felt. For the moon, I Googled "images of orange moon" and selected this photo:
I printed and trimmed the picture, then stuck it on the black felt with scotch tape. The black tones didn't match exactly, so I used "cloning" feature in my Paint.Net program to mask as much of the imperfections as I could.