Rendering study - The primitives were drawn in photoshop, and the background was rendered in Modo using one of the free HDR images from http://noemotionhdrs.net/
Speedtree isn't actually that fast to render as the geometry isn't that efficient. A hand modeled tree will render as fast as a speedtree as long as it has LODs.
The way you're half-rendering the wireframe doesn't work. Make one 'in-game' rendering, and one with a wireframe, and possibly with flat/fullbright textures.
Modelled in 3dsMax, rendered in Substance. This was more modular than it needed to be. The main UV shells are overlapped, rendering unique texture details pointless.