Not sure I'm doing wrong. First I made a 512x512 bmp file and put it in the Graphics folder, following the instructions in the HLG manual. That didn't work, so then, looking at other map folders I saw some of them had a file Carte2d.bmp (1024x768) so I tried resizing and using that file name, but that didn't work either. The only thing I can think of is that my BMP is 24 bit colour but the others are 32 bit, perhaps that is the problem?