Step 1
Now let's open up Photoshop, we always work with an A3 300 dpi size because you never know if a magazine wants high-res files and of course you want to print your own work out, and for all of that 300 dpi is perfect. Now before you start with the artwork you should make some groups to put your layers in.
Group 1 will be named "Background," Group 2 will be the "Model" and you can add groups like "Color" as you go along. I also use groups called "PLAY," here where I play with patterns and add little details to make it look better. Below you can see how the groups look before even starting the illustration.