Texturing a simple object with two materials in Blender.
First select the object you want to texture.
Here is a welknown lamp used as example.
First go to the properties window and choose a material.
Choose a texture for this material.
Add a second material inmediately.
Choose another texture for this material.
You now have something like this.
Show your object in frontview:
“Tab “ to edit mode. Select the faces belonging to the first material .
(In this case only 2 faces 1 in front and 1 on the back side.)
assign those faces to the first material in the properties window.
And after that you press “U” to unwrap those faces in the 3D window.
Use “project from view as unwrapping method.
scale the view up as i did in the UV editor.
Now hide those unwrapped faces using “H”
You now have this.
Now “A”select all remaining faces.
Assign those faces in the propperties window of the material editor to the second material.
Go back to the 3Dview.
Unselect all faces .
Select now all the front faces and all the back faces
and unwrap them using while in front view
“project from view as unwrapping method.
Back and front of the lamp overlap in the uveditor , so it looks like 1 side.
Now in the uv editor select 1vertice!
Press Ctrl “L” to select all linkt vertices and drag it aside to separate back from front.
hide those unwrapped faces using “H” in the 3d window.
There are still faces left to unwrap
Now mark a few seams to avoid that faces are forming a “closed loop”
You can do that by pressing “ctrl e” after you selected the edges
in the 3D window choose “A” to select all faces.
And after that choose “U”to unwrap using the “Unwrap “ method.
Now its done ,
the final result looks like this in textured object mode
finally in edit mode 3D view unhide all Faces using “alt H”
and in the UV editor choose “A” to select all faces to active.