How to resize maps with same colour quality?

[d3rd3vil]

Hello!

I have a Worms Armageddon map in front of me, with the resolution 1920x696 for example! The colours are great! But I'd like to resize the map, I want it to be a little bit bigger :)

Now how do I do that, fast and without colourloss PLEASE?

I tried to resize it with IrfanView for example, that works. Than I can save it as *.bmp and open it with Gimp. There I HAVE to select 112 colours (right?)?

But then the map looks bull****. The background looks cheap, with bad red colours or sth. like that and the whole quality is lost. It looks dry and bad :(

But there ARE big maps with good colours, so plz, how is it possible to resize the map fast without many losses?

Thank yo very much in advance :)
d3rd3vil

[Explorer]

Try the "Nearest Neighbor" interpolation, for paletted images.

Then, fix the jagged edges yourself.

[d3rd3vil]

Well...what? ^^ Which program(s) should I use?

[Explorer]

Most image editing programs can do this, even Microsoft Paint.

By the way, have you read this guide (http://worms2d.info/Colour_map) before you make the map?