See the results of the new quality improvements to the reshade algorithm. The effects are more noticeable for larger zooms. Here is an example of a 400% enlargement (1600% in area).
Old vs New reshade (click to enlarge)


The most noticeable changes are better edge estimation and stronger possible sharpening (without side-effects).
A correction has been implemented to the sharpen coefficient. It is now dependent on the zoom factor. This allows specifying the same sharpen value to obtain the desired edge-contrast for varying levels of zoom.
The interpolation quality will be better in the stand alone reshader. It runs a little slower than the one on the site, but it’s worth the processing time if running it on your own computer.
When exaggerating the level of thinning, some aliasing might arise. An anti-alias filter has been implemented for this purpose. It’s pretty slow for now, and not available online, but very useful considering that there is no replacement for it except non-automatic solutions.
Using the new smooth feature, beautiful paintings can be created from simple photos. Defects are easily removed automatically. This works great on compression or noise degraded pictures. The photos also are enlarged for better quality printing. See the examples below.
From this photo:

Using reshading with smoothing you get (click to see the 2x enlarged crop):

This feature will be fully available in the stand-alone version of reshade. On the site only lower smooth factors are allowed for now. To see the painting effect yourself, add an image to reshade and from the settings pane select smooth with a value of 100. Use a sharpen value that looks best. More smoothing creates a more artistic look, also removing more imperfections from the base image.