We can't properly export 'certain' animations (yet).. so adding and weighing the bones for the cape hasn't been implemented. There's an alpha of the model exporter out, but it doesn't (or didn't for me) export properly.
Granted there's many other modelers (better I might add) here on the site, so I'd be tempted to say that although I couldn't do it, it doesn't mean it isn't possible.. or won't be with further tweaks to MDLOps...
Linear Mode
