Note about image.bmp

image.bmp is a modification of the image fog-1208290_960_720.jpg,
retrieved on https://pixabay.com/en/fog-house-tree-light-clouds-1208290
and is CCo Public Domain, no attribution required according to that web
page, see https://creativecommons.org/publicdomain/zero/1.0/deed.en.

Didier Spaier, 09/04/2016