I've been trying to make texture maps for some objects. Got the free UVmapper and doing pretty well. know how to save seperate materials now, but I don't know what size to save the texture maps at. Cann't find a tut that tells me this. Should they always be saved square? Or can they be rectangle like the screen size?

You can save in any size you like. Points to be born in mind are:-

• Textures tend to be made at the same size as the template. If you want a highly detailed texture then you'll need a larger map. As a rough guide I use 512x512 for general scene props, 1024x1024 for average resolution body and head textures, 2048x2048 for higher resolution body and head textures.
• Some programs prefer square textures, some also want the sides to be in powers of 2. i.e. 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 etc

Yes it is the template I am trying to save. I quess square is best then. Thanks for the info on even numbers too. Didn't have a clue about that.