Plug-ins / scripts for greater control of edges

Anyone know of any plugins or python scripts which allows greater control over the line thickness when using Blender’s ‘edge’ function?

3d view/game engine/render?

Sorry, didn’t explain it very well - I mean in renders. I’m using the ‘edge’ function in the render settings, but need the lines to be of a similar thickness, rather than some hairlines and some really bold, which is what normally happens when the ‘Eint’ setting is turned up.