`Unable to get realistic ambient occlusion for chair legs

Hi,

I am trying to achieve realistic ambient occlusion for the chair legs but still got almost nothing and the chair looks like a bit in the air. Chair and carpets are both static.

 

You say it's static, but that looks like realtime light to me?

Also, I'm not seeing any GI, have you baked the scene?

Also, Ambient Occlusion is not realistic, it's a fake effect.

 

They are static, but the light source / sun is mixed because there are some other objects which are moving. I've tried making it be baked and it actually looked a little bit nicer.

Yes, I've baked the scene.

I just want to get the chair to be not looking in the air. It seems Ambient Occlusion is good enough to achieve that, isn't it ?

 

Possible solutions if using mixed.

Add another ambient light source, this could be an area light or point light.
Reduce the bias to zero on the light source. This resolves the floating object/ shadow is not connected to object problem.

You can find more tips and tricks here.
https://forum.unity.com/threads/archviz-tips-lets-make-unity-better-than-ever-photorealism.532146/