Forget about the b3d loader, I wrote one, actually a converter. But I struggle at the implementation of simple collision. According to Niko, I have to convert the content in Coppercube to a ccbjs file and load that in Copperlicht, in order to use collision on meshes. But that's exactly what I did not want to do, but instead write my own editor for copperlicht.
In WebGL, there's always SOME thing, sucking.