Master the gradient mesh tool

11. For the nostril, add a mesh inside the area we isolated. Select each handle on the points and mould the path to the curvature of the nostril. Add more mesh points to indicate the shadow under the nostril and a highlight on the top.

12. When you’re creating the shadow areas on the face, be sure to use as many mesh points as necessary to accomplish the curvature of the face. Pay special attention to areas where the skin folds and creases. Don’t be afraid to pull the mesh completely outside the path. This is great for situations when you wish to create a smooth graduation of colour on the edge of a path.

13. For the horn shape over the eyes we need to create separate meshes and then blend them into the skin. First draw the shape of the horn, keeping it as simple as possible, then add a mesh. The mesh will follow the contour of the path and give form to the shape, so all you will need to do is add mesh for light and shadow.

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