yeah, as the pants affect the shirt but the shirt will not affect the pants, you can do the sim for the pants first (ignoring the shirt), then run the sim for the shirt while having the pants as collision target. Just like you did.

Perhaps the sim just nees more steps per frame, or perhaps the shirt isn't wide enough to make it all around the hips including the wrinkles. Sometimes just watching the animation frame by frame reveals the problem. Note indeed that Cloth Room makes real-life sims based on real-life parameters, so the cloth behaves like real stuff in real time.

We're thinking with you...

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though