The task was to design two scary houses that Jesper was supposed to sneak into. On top of that the first one had to resemble Mrs Krum's silhouette holding a frog toy. That would be a 2d camera pan so I considered a simple sphere projection on a portion of the sphere. You can test it in panorama projection. I really enjoyed the task however I failed to paint a horror like sky that would be within our style boundaries.
Eventually we ended up having only the first house in the movie. This is a concept art only, the final BG has been painted by Thibaut Denise.
The same image projected on the sphere. Zoom in and pan to watch the camera work.