Shadow is not solid

Hi,everyone
I want do the shadow as the figure ,but the effect is . I translate the main camera. but effect is not same.anyone know the reason ???
The origin figure , the last row parallel the bottom ,and it looks like the icon's plane is close and the shadow plane is far away.but my figure is not that, it like two closed plane, and just is stagger.
Because the origin figure is a screenshot of TAT's 3D Eyetracking UI video, Does it possible that the icon is not out of shape , because it's a video ,the real camera make it look like? I think that because the last row of the icon is parallel the phone's bottom.
But I translate the main camera and not rotate it , the effect is just like two plane stagger not 3D.
I appreciate your help!
thx

 

I don't see a problem. Try changing shadow intensity.

 

Thank your reply. Because I don't use shadow of light ,so it is not useful for me.

 

Then make the shadow texture material darker or have less transparency.

 

I darker and less transparency the shadow ,but its effect is also not good.
Because the origin figure is a screenshot of TAT's 3D Eyetracking UI video, Does it possible that the icon is not out of shape , because it's a video ,the real camera make it look like? I think that because the last row of the icon is parallel the phone's bottom.
But I translate the main camera and not rotate it , the effect is just like two plane stagger not 3D.
I appreciate your help!

 

The first time you look maybe same, but look it careful , it's difference.