Playing with broken images is one thing but can the Nik Software make otherwise attractive images "better" (for some value of better). In this experiment I'll take an image from a 2013 visit to the Chartres Cathedral, with a working Nikon D3s, and have some fun with Analog Efex and Color Efex.
Firstly the original Lightroom 6 corrected image is
And now the Analog Efex Pro version (Classic Camera 7)
And finally the Color Efex Pro (Soft Landscape, I know it's not a landscape but that's the recipe that I liked)
It's obviously very subjective but I do like the Color Efex Pro version the most.
I've been trying to recover some images that I took in 2011 when my Nikon D3 was dying in a rather spectacular. It had got wet when I was caught in some rain in Tallinn, Estonia. The LCD displays had fogged up, which indicated to me that the seals had not worked as expected and true for form bad things started to happen. I continued to shoot with it although it was obviously not a happy camper. The most obvious symptom was it was having trouble metering and so was overexposing images but less obviously auto focus wasn't. Originally it had seemed to have given up completely but while it's function returned it's accuracy didn't. After attempting to correct some of the overexposed images in Lightroom I decided to give the various components of the Nik software suite a chance too.
One of the images I played with was an "slightly" overexposed image of the Pont des Arts in Paris.
I corrected it in Lighroom 6 but it was clear that there were still problems with it so maybe one of the Nik components could improve it.
Here is one attempt with Color Efex Pro 4.
Maybe it would work in Black and White so the corrected image got given to Silver Efex Pro 2 and the "Wet Rocks" process applied.
Finally Analog Efex Pro 2 gets a run.
There was just not enough detail left where the sun was in the sky so ultimately I don't think anything really works but it's an interesting exercise to show what can be done to recover an image as long as it's shot in raw.