pcx vs bmp

[Timosity]

I was just wondering whether it makes any difference to the games file size if you import sprites and backgrounds with pcx files or bmp

generally pcx files are smaller file sizes but when you import I guess it stores the files in a different format.

Is that  the way it works?

[scotch]

You're right, it makes no difference to the way AGS stores the graphics.  In AGS the sprites aren't compressed, the backgrounds are though.. although when you zip the game up the sprites compress well.
PCX is just better to use to save disk space, although that probably isn't a problem unless you have a lot of high res graphics.