Lesson 4: extrude, the king of the tools! Our 3d chair is realistic now!

Do you know Blender can work for you with the Mirror tool?
Yes sir, just design a part of an object and Blender will do the rest!
It works for specular mesh only, but this is the case, our chair can be modeled for half only, so this is the trick, use CTRL + R, move the mouse on the half of the chair till you see a violet line, confirm with a double click, do it for the back chair and the seat:

now from the front view select the left vertices, and delete them  with X:

Select all the left vertex of the remaining mesh, use Shift + S and Cursor to selected :

Press T and set origin to 3d Cursor:

From the properties panel on the right get the Mirror:

Wow, now the chair is still here but you just need to work on half of it!

Details are very important in a realistic 3d, so give it up to get a better seat, use edge loop to divide it in the Z axis:

Change mesh select mode to face with CTRL + TAB,  select the right face and extrude a little bit out with E:

Do the same with the front faces, in this case there are 2 to extrude, just select both using Shift:

Now change Mesh select mode to Edge,and select the edge of the top seat:

To obtain a smooth border there is another helpful tool: the Bevel!
CTRL + B and rotate the wheel mouse to increment of the effect:

There's a little problem due the scale we used to change misure of the initial cube, no problem we can rest it with in object mode with CTRL+ A

Now we can apply the Bevel tool:

Press T to show the transform panel on the left, click Smooth on the Shading:

Very good, but all the chair looks smooth... and we want the border only!
Very easy, another tool we will work on it, from Properties panel add the modifier Edge Split, done!

Another F12 for rendering and this is the result, always better!

Lesson 3: change shape to the chair with the edit mode

Today we will discover an incredibly powerful tool, the edit mode, to enter it just select from the low bar or with the Tab key, the object change and are visible vertex, edges and faces:

Press A to deselect vertex, and select just the top chair, use B (square selection) or C (circle selection), the four vertex should be orange like below, and scale them down on the Y axis, so use S and Y:

Deselect again, and select the lower vertex of the legs, all the 16, change view to Top with 7, change mesh select mode in Face with CTRL+Tab and from the bar the pivot point in Individual origins, scale just a little bit:

From right view with 3, select the vertex of the front legs, snap them to the seat, after do the same with the other two legs:

Select the top chair vertex again and snap to the seat:

From front view with 1, select the left lower vertex and snap to the seat, do the same with the right legs:

Done! You can change color to material for a better look:

And with a quick render this is the result, just a few clicks and the chair looks more realistics and professionally made!

Have a look to the next lesson, you'll learn other fantastic tools.