Drawing 3D as if real.

Hi all.
this time I want to share with the steemian about 3D images
I really admire the 3D drawers,
I've tried to draw but it never works
I also will not give up so easily.
here are some examples of very simple 3D images.


maybe you all the steemians ever tried to draw with simple 3D techniques
I hope you guys want to share information with me specially and to the general steemian.

thanks for reading my post.