Those are images that users of this forum have kindly donated to the community (they have uploaded the images and granted permissions to use them freely), so you can download them, use them, process them, and if you like what you have done, even upload your resulting image to the corresponding thread (the one where you downloaded the image from).
That gives you the opportunity to play with raw images from cameras you don’t own, and/or practice your skills with a certain software or tool.
Thanks for the info. Do you happen to know if there’s a raw there that will for sure work with RT 5.8 Retinex? If so, I could eliminate RT as the problem and look to my own computer instead …
And with fine I mean that the moment you turn on the Retinex tool, the changes are really visible. You may even have a lot of fun with it, because the changes could be really dramatic.
An RW2 from my Panasonic GH1 also worked. So Sigma X3Fs don’t work and I suspect that the DNG that I tried was the unusual Linear (non-Bayer) type because it was converted from a Sigma X3F too.