07. Finish adding some dark colours to the foreground, and then it’s time to create the sky, on a background layer. Instead of having a vertical gradient sky, we can add a large shape covering most of the background but leaving some light near the horizon-line. Add a Gaussian Blur, as you did on the flames. Apply a little more Gaussian Blur to a couple of the flames.
08. Next let’s experiment with the Twirl tool to add some drama to the sky – in your Tools palette it’s one of the options on the Warp tool. Draw random shapes onto the skyline, getting darker the closer they are to the top of your artboard, then let rip with the Twirl tool. The Warp tool can be helpful for controlling the shape of your distortion. Once you’re happy with the results, change the opacity mode to Multiply. This will help create a psychedelic skyline.
09. Now let’s turn our attention to the liquid flowing from the bottle into the glass. Look at photographs of water, then try to simplify these into your art. Draw abstract shapes that mimic waves in a range of shades, play with the Twirl tool, and use the Pen tool to add dark edges and darker areas.
10. The key to making the liquid look glossy and finished is to add strong white highlights to the bubbles, liquid and glass. Use these highlights to show movement in the liquid. Overlapping the shading adds contrast to the area.