The programs takes the name of the obj file as an argument. Models with multiple materials is supported. Currently, only these parameters of the material is used in shading: Ka, Kd, Ks, Ns, map_Ka, ...
Step 1: you need download sketchup software and install it in your Windows PC or Mac OX, Then choose your favourite models and download the sketchup files from this LINK. Step 2: Open *.skp files ...