I made a few circles in your first render
Those are places where I expect more shadow. So I think it could be the settings for the lights and and shadows: shadows, bias, contact shadow, etc
Later on I see you want to improve the lighting/HDRI, but world light doesn’t cast shadows in EEVE, so I doubt if that will make things better.
I am curious how those shadows would look like in the free spEEVEE addon.
If you want to give it a try a few tips:
- You can turn on HDRI, but just a tiny bit, like 0.1 strength
- Use the beige-looking preset which has a grid and very colorful bouncing-light-box (cube for indirect lighting). I believe that preset looks less sterile.
- Always bake after changing lights / before rendering.
- You can give the backdrop a lighter color before baking, after baking you turn it down again. (bit of cheating).
In your second render I the shadows in the basket with apples looks a bit weird, and I think that’s because you are using to much HDRI / World light. (It doesn’t cast shadow)