mapsource background colour

when installing an img to mapsource is there a way of changing the default background colour,ie some instruction that can be used in the TYP file, background color=rgb(r,g,b) ?

I’ve managed to anwer my own question.

You can set background polygon 0x4b to white ensuring drawing order is 1; I’ve been working on an OS 1:50 look a like style using osm data; looks great.

However, I have realised all is not that simple: it only seems to work if there is another polygon at the same level,ie industrial and only if the img contains such a polygon…

Anyone interested <>

I’d be keen to see your TYP file if you are willing to share it.