While working on T11106 (gantry tilt correction), I found that MITK's 2D rendering of images shows an interesting behavior, which seems wrong. If it IS intended behavior, I could'nt find the reason for it.

What hapens:

Load two images with the same spacing but slightly different origins: one has a shift along the Y axis. Rendering generates some kind of raster which is common to both images. You can easily see this by turning the top image visible/invisible.

I would expect both pixel grids to be rendered exactly, i.e. when toggling visibility, the user should recognize that there is a slight difference.

Does anybody have an explanation for this behaviour. Is this technically necesary for some feature to work? Or is it a bug that can be fixed?

(attached two images to easily observe the effect)