real world clothing assumes you pick a size that will fit you now. Gain weight, lose weight, tone up your muscles and you need to go buy new clothes.   Thats not feasible for Poser.

 

If you morph M4 to ass a beer belly you expect the beer belly morph to be in the clothing, so it will fit. If it is not you need to find a utility that will add it , or use magnets or the morph tool.

 

Dynamic clothing avoids some of this by funning a simulation that drapes the cloth to the figure whatever its shape and within limits that works ok.

 

I believe I understand your idea, but thats not quite how clothing is assembled since a large waist assumes big butt and heavy thighs (for men) and large shoulder span seems to assume deep chest.

  The current morph system can work well, it just seems that many vendors do not include all the morphs that are used to make characters.