Simulation of a dress on a 3D-Lady 3D Render, Digital Artwork by Mjrk

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Simulation of a dress on a 3D-Lady

3D Render by Mjrk

… and the (my) preparations therefore.
As far as I have gathered, some have problems with dforce simulations.
By no means would I say that I know how to do it. But I had (and still have)
so many exploding garments and meanwhile I found some tricks to avoid
these situations. Perhaps this may be useful for one or the other.

First of all remember that it takes 25 to 30 frames for 1 second of an animation.
It is often said the end position should be at frame 15 and the following
30 frames or even more are for the draping of the clothes.
That’s much too fast, it may work for a standing or walking position.
But it would take you more than half a second to sit in i.e. an armchair.
The end position at frame 23 or even 30 works well in most cases.
(and yes - the simulation works nervwreckingly slow. One can watch a short
movie or clean the dishes in that time). If you are patient enough to watch,
it maybe useful to save the file several times, especially some frames before
the figure reaches the desired position.
When I found the sitting position I want to try, I check frame by frame if the limbs
touch each other or even cut trough another part of the body or the chair.
I the put some tights on the figure, lower the opacity (>Surface Tab > Opacity).
The figure, other clothes and hair are then made invisible to see, where the parts
of the body would make a dent in the upholstery. (Picture 2)
With the mesh-grabber tool I select the quads where the body of the figure
and the upholstery share a a common space and press them down (Y-direction,
sometimes in z-direction on the front of a chair or sofa). Tool settings at ca.50%.
Several steps with decreased selections may be necessary.
Then I pull back the chair (frame 0), even move it a bit under the ground and tilt
it along the x-axis towards the figure. I try to get some kind of curved movement
of the chair until it reaches the final position (Picture 3)
You don’t get a feministic rant for this kind of old-fashioned chivalry from a 3D-Lady.
Actually they appreciate your politeness.
Start the simulation.
In the case shown here I tried 3 other dresses and they all behaved well.
Thanks for looking - and reading!

P.S. In this example I used an armchair from the „Vintage Furniture“ by LaurieS.
As beautiful as it is made, it is difficult to select the right facets on the upholstery.
I exported it as an OBJ and separated the whole thing in Cinema 4D, exported
as separate OBJ-Files and built it together again in DAZ-Studio.
Then the selections are correct - and I have the advantage of separate frame,
rivets and upholstery.