Ok has stated in here i have developed a framework that renders shadows and other stuff into batch models, used initially some ideas of geomeppy, although had to do it from scratch for catering with efficiency here is links https://unmethours.com/question/42532/ubem-models-new-framework-and-developer-survey/ for the details of the framework will release soon a whitepaper which i can link by requests. Cheers.whitepaper. Regards, Franc.