Need help with creating a mod.

[Salty Soup]

I'm making a total conversion mod that is centered around Poland and it's neighbours. I need some help though, because my game crashes everytime it tries to load rivers (rivers.bmp down below scaled down to 256 pixels from 1024). I checked if the colors were alright and they matched the vanilla colors. I don't know what to do, because last time I tried making a total conversion mod it worked (not perfectly but it didn't crash my game.)

 

[Aerotinge]

Have no actual river.bmp to check but it would be wrong color pattern order.
see wiki for more help

 

[Salty Soup]

I just checked to colors and they're the same as colors in the vanilla rivers.bmp, also even when i remove them the game still crashes
EDIT: The game also crashes when I remove the rivers.bmp file
EDIT EDIT: The game doesn't crash when i only have world_normal_height.bmp, topology.bmp and colormaps and when i put in provinces.bmp, rivers.bmp and terrain.bmp it crashes.

 

[Aerotinge]

Same color is not the point, it's pattern order that matters.
And you have also other wrong format in these .bmp files that crashes your CK2. Just read the wiki thoroughly if you don't know what I'm talking about.
Your GIMP/PS should give you detailed information in Image Properties(alt+return),

 

[Salty Soup]

I just changed everything and the game doesn't crash anymore, it's not perfect though, the terrain is really buggy and stretched.