Yes, that is it and export as bitmap. Here is a 1 degree rotated version. Like I was saying, where the gradient becomes grid aligned it has an elevated effect.

Strange... They showed in the preview when I was editing... and I'm notorious for hitting quote instead of edit. Perhaps imagebin is not good for this. Okay: as should be seen below, the shading on the edges near the selection border curves outward instead of inward near the corners and looks flat o...

This is the screen buffer copied to PSP looks:

This is the PNG export:

It is warped...