Before I started to work on more complex projects, I wanted to work through all the sketches I had begun in the past. There were still some old sketches from a year ago in my ideas folder - The Lava Lamp was one of them. Inspired by the Photoshop technique of Rik Oestenbroek, I tried shading and lighting shapes within Photoshop. So the illustration has been practically a study or exercise to understand even more what you can do in Photoshop and how you can make simple shapes 3d-dimensional.
Since Rik Oestenbroek often incorporates people and objects into his works, I decided to model a simple lava lamp and use it for my illustration.