Fix to work in Blender 2.81
Fixes issues importing in latest Blender 2.8 beta. (Blender 2.79 version is unchanged, and can be found in the blender279 branch, or in the associated zip.)
Improved performance by 30-40%
Improved sloped grainy texture calculations.
Adds a grainy texture on sloped faces. Fix for setting horizon colour. Fix for logo size on some studs.
Added option to set up a scene: remove default cube and lamp, add a ground plane, use an environment texture for lighting the scene, position the camera in a good position to see the model, and set some useful render settings so it's ready to render.
Bevel width option. Adjusted white line thickness. Added support for fluorescence to the relevant transparent pieces.
Added support for the new Principled Shader, which is used when available, for optimal look.