Thanks for the replies and thanks Dudu for the step-by-step description of the Marvellous Designer workflow.

Just thinking out loud ... the possible workflow for using VWD's script might be:

1  Clothe and animate a figure in Poser

2  Run VWD's cloth simulation for this animated figure

3  VWD can output the results in .PC2 format and a script can turn this into .MDD format

4  With Fenric's plugin installed into Carrara, the .MDD file can be brought into Carrara.   The .MDD file will only be the animated cloth, I think.  It's unlikely to be the figure also?

Poser can output animated figures as object sequences, I think.  There is, I believe, a Carrara plugin available for importing object sequences.

Maybe the animated figure alone in the scene could be saved as a Poser scene.  Such a scene could be opened in Carrara then the .MDD import could take place perhaps.

All of the foregoing begins from a Poser scene.  I don't know how it could start from a Carrara project.  Isuppose Poser's ability to output .BVH files might be brought into play.