The cylinder was then converted to an editable poly and the vertices could now be shaped using the outline of the trousers in the image as a guide
By duplicating the cylinder I could now create the other side of the trousers and these two cylinders were then welded together, firstly by attaching them.
To create the creases in the trousers I played around, moving and shaping the vertices to give the trousers a more realistic look.
A material was then created for the trousers. This was done by using a Unwrap UVW modifier. It was necessary to pull out the vertices in the edit mode to shape the trousers to that the material would fit properly.
I then rendered the UVW image to import to Photoshop.
In Photoshop I then took sections of a pair of trousers and slowly built up a pair that I could use as the material for my trousers.
Once completed the material could now be applied to the trousers.