I wanted to know how should I determine a good texture size ? Currently, I always create UV texture that are 1024x1024px but if I create for example, a big house with a 1024px texture size, it will looks pretty bad.

So, should I create different texture size (512, 1024, ...) for different mesh size like this ? :

or is it better to always do high-resolution texture and then reduce it in the software (ie : increase the LODBias settings in UDK reduce the size of the texture) ?

Thanks for your answer.

ps : sorry for my english !