Paul Furman wrote:

Dissolving the filter doesn't change the circuitry and firmware. The
camera still interprets the 2x2 sensor array as one pixel.

That's incorrect. The algorithms used to determine pixel values
actually look at MORE than a 2x2 array! They try to determine, for example,
if an edge runs through a pixel. If it does, they use other
parts of the two sides ... outside a 2x2 array ... to try to determine
all three RGB values of the pixel. The algortithms are nonlinear ..
they do not merely interpolate. They actually GUESS.


The raw file has the separate bayer parts unmerged.

I'm not sure how a half pixel shift would work for increasing
resolution... perhaps you'd need to go 1-1/2 or 2-1/2 pixels.


1/2 pixel increments would work.

Doug McDonald