I could modify the ruleset file without problem
Perhaps is it better to create your own ruleset which will overrule what you need, avoiding you to have to modify FMP anytime it is upgraded
Just name it FMPAddon.rul so that it appears after FMP.rul in mod list, and be sure you always load it after FMP (eventually toogle FMP off/on, then toggle FMPAddon off/on ; or check mod sequence in options.cfg)
So, here is the question: which sofware can be used to modify graphics files and then be able to include in the game without problem? I currently use Paint.Net or the GIMP...
are two images atteched, showing the problem I stumbled on...
I am absolutely not expert, so others will give you right answers to this question
Anyway, I can try to give you a work around that should allow you to begin your modifications until having all information you asked
Work around :
- make a copy of a valid GIF or PGN => This will load the correct palette and correct background
- rename it, lets say MyFileName.PNG for further explanation
- open it with GIMP, cut existing pixels, then save it. WARNING ! Do not use "save" or "save as" menu options but "File > Overwrite MyFileName.PNG" [not sure as I translate it from french]
- eventually resize it if needed
- eventually fill it with background color (right click option : Edit > Fill In with BG color Ctrl+.) [not sure as I translate it from french] or copy and paste existing background color pixels
- if you don't want to redraw from scratch, you can then open your "bad" file, and copy and paste colored pixels
Do not forget to test it in game as soon as possible before dealing with other images, in order to to be sure it works as you want