Ceating a simple 3D box in photoshop

how to create a 3d box 

STEP1: Create a rectangle and place it at the centre...

 STEP 2: Copy this rectangle ( Cntrl+j).Select the second rectangle.

                Go to EDIT >  TRANSFORM > DISTORT 

  STEP 3: Join the lower edges of the second rectangle with the upper edges of first rectangle.

STEP 4: Lower the two upper edges of the second rectangle till its appropriate enough.                                    

STEP 5: Create a duplicate of the 1st layer and use distort option again to join the edges of the 3rd rectangle to the edges of 1st and 2nd rectangle.                                                                             

STEP 6: You can make boxes of different dimensions and different patterns similarly.For the box to be tilted               you can use the perspective option (EDIT > TRANSFORM > PERSPECTIVE )