[PyMOL] How to show a ribbon of a loop with alternate conformations

[Schubert, C. [PRDUS] <CSC...@it...>]

Seemingly simple, but I can't figure it out: 
I modeled a loop in 2 alternate conformations and want to display both
of the conformations in a ribbon or cartoon. The selection "show ribbon,
prot and alt B" does not do the trick. The selection syntax must be
correct since "color red, prot and alt B; show lines prot and alt B"
works. I could show only the backbone atoms in a pinch, but that is not
really what I want. Hard to imagine that this is a limitation in PyMol
nobody noticed over the years.

Cheers

	Carsten