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To complete the drawing I finish by defining the details. I start by adding some tones to the different shadowed areas, and for this use coloured pencils which have a subtle colour. In this example I have used a light blue and a yellow coloured pencil.
I also want the drawing to feel a little more raw, and therefore have added a slight patina using various Copic markers (n4-N7).
The process is completed by using gouache and a fine brush to define the sharp edges. This is also a good way to create strong part lines and cracked surfaces. Finally I take one last look to check that no details have been lost in the process or if there is anything that still needs to be emphasised. If so I correct these flaws, and the drawing is complete.

Good luck.
Once I have completed the adding shadows and highlights I begin to add a little more contrast to the image. I do this using a darker Copic pen than the previous stage (N5/N6), working through the drawing seeking areas that are partly or completely covered in shadow. This helps create more drama and gives the sketch a more aggressive feeling.
Since I also want some areas of the drawing to have smooth gradients I work some areas with a black pencil (Caran d' Ache). From here I again take the white pencil and begin to block in areas surrounding the body and wings of the fly. This helps the shape to break out of the paper by providing a strong contrast. and by applying this in a loose and fast sketchy fashion can create a sense of movement and motion.
Now it is time to start adding highlights and shadows to the image. I usually begin this by seeking out the areas that will be cast in shadow, and define these using a dark Copic marker (N4). The important thing to remember at this stage is to define a light source and direction. In this drawing for instance, the light source is in the upper left corner of the page. Continuing with a white pencil I then begin to add the highlights and reflections. The reflections are drawn in hard and sharp with the pencil since I want the fly to appear made out of metal. The white pencil is also used to create the transparent material for the wings. Here the pencil work is much softer.
For this tutorial I have used coloured paper which provides a good grounding since it gives you the mid tones in the sketch for free. I have also used Copic marker pens, coloured pencils (Caran d' Ache), an ink pen (Pilot g-tech-c 0.4) and some gouache (Winsor & Newton).
I begin by drawing a basic figure using only a light grey copic marker (N2), and work freely, not taking to much notice of mistakes or flaws.

Next I begin to define the details of the fly using an ink pen. The rough drawing that I produced with the Copic markers provides a good basis for this, providing shapes and intersections that I can emphasise. At this stage, if the drawing has ellipses it is a good idea to use a set of ellipse guides as at this stage the idea is to tighten up the drawing.

In this tutorial Mats Sjögren, an Industrial Design student at HDK Sweden, will guide us through a technique he uses to produce concept sketches and ideas. Mats gives his interests and influences as Bio-mech creatures, robots, comics and design in general.
page last updated; 2014-06-15
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