I often work with large (3072 x 2048) images; I manipulate them at the
large size (adjusting color balance, etc.) and then scale them down for use
on the web.

It's pretty frustrating that the images look totally different before
scaling (using "View/Zoom" to see the whole thing) and after scaling (with
"Image/Scale Image.")  The two mechanisms have *different* artifacts.  The
view zooming tends to make images look way granier than they will actually
end up looking once I resize them; so I find myself manipulating the higher
resolution image, and trying to *guess* what it's actually going to look
like once I scale it down.  That sucks. 

Here's an example that shows that the two mechanisms do totally different
things:

    1: "File / New"
       width = height = 3000

    2: "Filters / Render / Pattern / Grid"
       width 1 1 0
       spacing 100 100 2
       offset 8 8 6

    3: "Rotate Layer or Selection" (from pallette)
       angle -0.5
       center 1500 1500
       interp: cubic (best)

    4: "View / zoom" 1:8

       Note that it doesn't look at all like a grid any more!

    5: "Image / Scale Image" 0.12
    6: "View / Zoom" 1:1

       Note that now it *does* look like a grid.


So I want an option that makes "View / Zoom" not suck, even if that's slower.