I hope this doesn't come off as a criticism of your art since I only intend to share tips about dealing with technical issues related to this render.
I believe the leading cause of the problem was the context chosen for inpainting. Choosing an appropriate context when inpainting is important to preserve the overall image consistency.
For example, if you select only the background girls and try to inpaint, the result will likely not look realistic. The reason is that the area (or the "context") is too small and contains few hints to determine the correct lighting condition and relative distances between objects.
Certain UIs like Krita allow advanced tools to deal with this problem. But there's also a neat trick you can use in any UI:
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As you can see from the above image, you can select extra regions to expand the context without affecting unwanted areas around the subject. In this case, I added two extra regions to make the context area (the red rectangle) include a part of the front girl's body and the men in the background to give the AI a better idea about the relative position those two crucified girls are in.
Also, it's important to keep the context as consistent as possible in terms of lighting conditions (i.e. light direction, tone) and focus effect (i.e. depth of field):
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The original image contained a few problems regarding this aspect, likely confusing the AI when using the area as a context for inpaiting. It's best to avoid local inpainting with too small a context to prevent such issues (that's why it's best to use regional prompting as much as possible). But in case the image already contains inconsistencies like the above example, it's best to manipulate it using editing tool to "fix" the problems before running the output through a low noise inpainting.
You don't have to be skilled at photo editing to fix shadow or DOF problems. To remove a problematic shadow, for example, you can simply paint over the area in the same colour as the background. You don't have to worry if it looks cartoonish, as a low-level denoise will make it look realistic enough.
Similarly, you can draw missing shadows, making distant objects more blurry, and so on to recover some of the lost inconsistencies like this:
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(I didn't care to fix all the details or preserve the nails, since my intention isn't compete with Hornet1ba's fine original work.)
Hope this may help anyone having trouble with similar issues.