Here is another great drawing tutorial. This time it explains advanced isometric illustration techniques. Creating isometric drawings, especially exploded views, can be the thing that makes your project stand out from the rest.
In the last tutorial I covered how to make an isomeric grid and build simple blocky shapes on it. In this tutorial I’m going to talk about another method of creating isometric shapes that doesn’t require a grid and is much more useful if your objects are complex or curvy.
More about How-to: Advanced isometric illustrations [Drawn!]