640 x 480 resolution

[Intense Degree]

Trying a game with v3, on the General settings window I selected resolution as 640x480 (and have backgrounds drawn in this res) but when I create a room the resolution is 320x200 ( I can see this in the "Visual" section of the properties window, which I cannot change) and backgrounds therefore appear massive. Is there something blindingly obvious I have missed? Manual/WiKi don't seem to mention this.

[Khris]

In the Room settings, where it says  "Background to display", select "Main Background", then click the "Change..." button and import the 640x480 pic.

[Intense Degree]

Hmmm, Ok I should have mentioned that I have imported a picture using the very method you describe in that res but it still says it is in 320x200

[Khris]

I tried this before posting, I got a box telling me about the resolution change and that all drawn areas are going to be deleted. After confirming the message, the bg was imported and under visuals, all the numbers changed to 640x480 stuff.
There's one line where it'll still say 320x200, I believe that's the GUI coords or something like that which are always handled using lowres.

[Intense Degree]

Yeah, I got the same thing but when I run the game the background is still far too big as if it is running in 320x200. I know the background is the right size because when I do the same thing in v 2.72 everything is fine.