After importing and converting all your assets, ensure your layers are organized: give each one a logical name, and group together layers with objects you’re planning on scaling together. In this case, I’ve grouped together the layers containing the five images of the gum-drop morphing into the foetal Gummi Bear.
In this illustration, I want to use circles to frame key elements. I could just create circles in Photoshop but because I’m not sure what size they will ultimately end up, I will create them as vectors in Illustrator and place them in my Photoshop workspace as smart objects. This allows me to scale them cleanly without concern of ‘jaggies’. Here’s how: open Illustrator and create a new document. Select the Ellipse tool and click and drag the cursor while holding down the shift key to create a perfect circle. The size and colour aren’t important. Just be sure it is only a fill and no stroke.
Select the circle and copy it to the clipboard (Cmd/Ctrl + C). Go to the Photoshop document and paste the circle (Cmd/Ctrl + V). A dialog box appears showing your Paste options; select ‘Smart Object’. A new layer with your circle will automatically be created. Name the layer accordingly. If you need more than one circle, duplicate the original circle by right-clicking on its layer and selecting Duplicate Layer. Add a neutral grey background by creating a new layer, selecting all (Cmd/Ctrl + A) and filling with 50 per cent grey.
Move your objects around and compose as you see fit. Since all your elements are Smart Objects, you can freely scale without fretting over image resolution. Once you have a composition that you’re happy with, start jazzing things up by applying filters to some of your objects.