Many people have been impressed by the look of some images with the so called Dave Hill / Lucisart / Illustrated look. I kinda like this type of images. Of course, lighting the scene is a crucial part, but then postprocessing the image is what gives this particular look.
I think I found a way to get a look quite close to this, by using only available G’MIC filters, from Gimp.
Below are some examples (original at the left, processed at the right), using images which I downloaded from Pixabay:
If you like it, I’ll be happy to share the steps to achieve this look.