Great job @Swordslayer, I tried the script out and it works perfectly, often making shadows look better actually, smoothing out triangle edges. I'll modify it to not make a mesh copy, as I make a copy anyway as I loop through everything before exporting. I don't suppose you have or know of a script to dynamically…
Yep that's right, and you have to choose radiosity otherwise you only get shadows casted from other objects with light tracer, and no AO/self shadowing. And strangely it doesn't show up by default, you have to go back to the modify panel and the Vertex Paint panel pops up. You then have to click one of the top two buttons…