It’s called »painting«, I guess.
If information is missing in an image (in this case the parts of an object that would be visible in the reflection but not the refelcted itself) then one may have to create them to achieve realistic results.
Though in this case that might also make it seem recommendable to create a separate layer for the cape as it is farther removed than the legs …
Edit: That is assuming the object has depth and is not just something like a cardboard cut-out.
You could also just try if Puppet Warp on a flipped Smart Object copy of the Layer might not help achieve a slightly better result.
I would like to offer a method which is somewhat logical.
The example shows probably what I'm talking about,
but I don't have the time to improve the result.
Use one image of Superman
Apply a perspective transform so, that the feet are on a horizontal
line. Or use shear (the upper line is approximately parallel to the
Flip vertically and copy
Apply an inverse perspective transform so that the line through
the feet is slanted.
Executed more accurately and improved by some trials, it should work,
Best regards --Gernot Hoffmann
The Cape is on a Layer of its own (with missing parts painted in) and the body layer has the cape removed – because those two elements probably are pretty far apart near the floor.
The feets’ reflections are painted.
And you are right that at the knees the flattened distorsion is noticable – also at the upper edge of the boots it’s evident.
But I’m afraid Photoshop’s 3D features are no help here unless you are willing to actually sculpt the figure in 3D properly in another program.
That is nicely thought through Christoph. I actually looked for an image of a person standing on a reflective surface to get an accurate idea of what the reflection should really look like, but didn't find anything suitable. At the end of the day, it doesn't matter how good your Photoshop skills are if you don't have a clear mind picture of what you are trying to depict.