Gramble wrote:Yes, I understand the system. But you see, that there had been some problems when I tried to do this. And now I'm asking myself, how Ben made it so perfect.
This means, why is the background color blue, which blue? And why the hell does it work so nice with red company color?
Gramble, I'm sure you can make your truck look as nice as Ben's trains.
In the thread about company colours mentioned above, I promised to improve the applying of company colours, and I did(so at least one coder is not against making graphics changes ...

) That means that blending of company colours is now implemented(at least in the latest versions of my patch).
If you mean with the background colour blue, the colour of the mask, then the answer is because in the openttd palette 196-203 the colours are blueish (see attachment for the colours to use, it doesn't matter which one you pick, because the brightness will be taken from the original sprite, not the mask).
As Ben did correctly mention, the saturation of the original sprite is very important for CC if the original sprites looks like this:
http://www.tt-forums.net/viewtopic.php?p=657946#p657946( very desaturated ), hardly any CC will be applied.
But if you pick a colour like my example in the last post of that thread, CC will appear much better.
Since I saw you do use the Gimp, the method I use for recolouring (you may know some of it already, but I'm also gathering info for the wiki

)
1-open your sprite ( sprite 1)
2-open one of the mask files on the wiki (eg one of the train wagons)(sprite 2)
3-resize sprite 2 to the size of sprite 1
4-select the blue colour on the mask sprite as the foreground colour, and erase all pixels
5-goto sprite 1, and select all.
6-copy
7-goto sprite 2 and paste (Gimp will take care of the conversion to 8bpp). Because you did select the complete sprite, you don't have to worry about aligning
8-erase everything you don't want company colour applied to.
9-select everything that is left, and bucket fill with the colour of step 4 of this small tut.
10-save the mask as nnnn_zxm.png (nnnn is the spritenumber, x is the zoom level)
Hope this helps, if you still have problems please do reply, cause I really would like to see your truck ingame