Gradient's parameters

Take the same instrument to draw a part of the mailbox's cover with the black color:

The instrument PenTool will help to represent an element of the mailbox's backside. The parameters are shown:

Blending Options-Gradient Overlay

Gradient's parameters

Take
the already known instrument to represent a highlight on the lateral mailbox's side with the white color:

The same instrument will help to create a small flag on the lateral side of the mailbox. Use the parameters indicated below.

Blending Options-Gradient Overlay

Gradient's parameters

Blending Options-Stroke

Take the same instrument to draw a part of the mailbox's cover with the black color:

The instrument PenTool will help to represent an element of the mailbox's backside. The parameters are shown:

Blending Options-Gradient Overlay

Gradient's parameters

Take

The same instrument will help to create a small flag on the lateral side of the mailbox. Use the parameters indicated below.

Blending Options-Gradient Overlay

Gradient's parameters

Blending Options-Stroke
