When I first started model building in 2013, the first plane I built was the Revell kit of the Ford Trimotor. It was a very rough effort indeed, but first builds are, I guess. So I've always wanted to do the Trimotor again, and when I discovered that with the old Monogram kit of the Trimotor you could get the 'Antarctic Expedition' decals, I bought one. The decals themselves were too old to use, but I scanned them and printed them out on decal paper, and they worked fine.
Here, I've done two dioramas. The "snow" the plane and dogsled team sit on is the usual mix of bicarb soda, PVA glue and white paint.
My usual way of doing backgrounds is to print out a colour photo and stick it to the wall behind the dio. That wouldn't work here, as my colour printer can only print A4 sheets, which are too small. So, instead, I have photoshopped in the background.
In my other hobby of collecting diecast cars and bikes, I have created dozens of "photoshopped" dioramas, just for fun, so it's an easy enough method. Using the Photoshop technique here only takes about half an hour to create each dio.