Generate multiple renders of same scene, each at a different resolution? I would like to generate several renders of a static scene, each render being a different size (eg 1024x1024, 512x512 etc). Other than the size, each render will be identical.

Is there a way of doing this using, say, the command line, or a script? I am currently doing this by manually changing the dimensions within the render panel every time, but I was wondering if there's a quicker way.

I am using Blender Internal in this specific instance.

Many thanks
You could also render the maximum size and then plug some Scale nodes into the compositor followed by File Output nodes. That way you only have to render once, and the smaller resolutions will be generated by the big one. (set the Scale node to Absolute and choose the size in the X and Y fields below)