Can't change the layout drawing to realistic in layout space

[Gokul.h]

The picture i attached not displaying as full solid that's the issue. I don't know why it's looking like so many boxes

If anyone know how to solve this issue, Please say it and Thanks!

[DumR0]

Hi

1.Activate your view port, then go to visualize tab, visual styles  set it realistic, (in you image its not clear if you have correct visual style)

2. check if hardware acceleration is on

[Gokul.h]

How to activate viewport?
and for your information i drawn that in layout space.

[DumR0]

TO ACTIVETE VIEPORTS:

press the button in the status bar: paper*(yuo will see the viewport activate it self ), or double click inside your viewport

its a 3d model?

Please attach dwg file