THE PROBLEM:

Maxwell treats all cameras as if they were actual, real-life cameras, which means that its default is not a true parallel projection view; it has perspective distortion. Therefore, by default, Maxwell will not render accurate plans, sections, or elevations.

THE SOLUTION:

Rendering an orthographic view in Maxwell 3 is actually very easy compared to the roundabout method required with version 2, thanks to the introduction of new types of camera lenses, which can be found Camera tab of the Scene Manager. The one we’re looking for here is Parallel.

The Rhino:

Set your view to a parallel projection through the Viewport Properties of the viewport you want to render. This can be found by right clicking the name of the viewport; it is the last option in the menu that appears.

Then, under the Projection heading, make sure Parallel is selected.

Finally, in the Maxwell Scene Manager, select the Camera tab and find the heading called Aperture. Here you will find an option called Lens, which you should now set to Parallel. This should produce an orthographic view as seen in this example of a simple rectilinear solid in isometric view, rendered in Maxwell Fire: