LDView Image save based on real life size?

[Cam's Bricks]

It occurred to me that something is probably not obvious from the above: once you find a distance that is correct for the DPI you are interested in, you can use that value with any model. You may have to adjust SaveWidth and SaveHeight for physically larger models, but the distance calculation will be fixed for all models at a given DPI.

So if I work it out on a 2x2 Brick then I just expand the save width and height to fit whatever larger models I have? 

thanks for your quick response!