help with D-Force
Bella
Posts: 439
Hello,
I noticed a strange behaviour of dforce that makes like a little wave under the breast (see pic)
what could it be ?
Schermata 2022-12-07 alle 00.00.28.png
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Comments
Would check dforce weighting for that tee. You may have to add dF weight map - then you'll see if rigid painted. You may have to reweight to 100% yourself.
Other times clothes can get trapped under breasts depending on moprhs used. Doesn't look like situation here based on pic.
It may simply be the model - especially if it was not made for dForce. If it was modelled with cups around the breasts, as is often the case, and with a certain separation between skin and cloth then when you simulate the cupped areas will form loose pockets and the looseness will allow them to drop down below the breasts.
Yeah once in a while object is modelled in a similar way that textures were not PBR but biased with added shadows etc. Combination or one of (1) changing various dForce sim settings, (2) using Marvellous Designer, or (3) making a morph to smooth out any wierd shapes added to object would eventually fix this.
How does it look before simulation?
This is the item
https://www.daz3d.com/dforce-harem-jumpsuit-for-genesis-8-and-81-female
it seems it was made for dforce but indeed like you say with a certain separation between skin and cloth
It looks exactly the same, I didn't notice it, I just went to check it, before simulation has this "wave"
Thank you for your answer, what is a dF weight map ?
Select the item in the scene tab, and then Create > New dForce Modifier Weight Node
Then select the weightnode, enable weight brush, and in tool setting select the weight map. Then the clothing should become red-blue-grey and you can change the weights
But personally I think your problem comes from the projected morph. If using timeline, try at start to dial the character out (at least till the deformation is gone) and then dial the character shape up along the timeline, e.g. at frame 15. You can do that together when posing.
Eidt: reg. weightmaps, try to see this
The promo images don't show the same effect, do you get it on a default figure and with default settings?
yes, this is the figure
https://www.daz3d.com/millawa-8
just loaded, dressed and posed, nothing else
Thank you for the video, I can try - I never did the timeline process you suggest and I think I didnt understand it
thank you very much anyway ! 
Do you see the issue with the base Genesis 8 (or 8.1) Female?
No I don't! I just tried with the Base Genesis 8 and it worked perfectly, loaded and it was without that wave and after dforce still no wave!
It's probably the way the figure morph is projected into the clothing - that is broadly done by matching the moves of the nearest bit of the base figure, if the breasts are pulling in more than the lower chest then it will leave a ridge behind. The only real way to fix that, if smoothing won't do the job, is to make a custom morph to match the body morph that will smooth out areas like this.
Or you can use animated timeline for dForce and dial the character in during the timeline.
True, yes.
Careful though, if dForce simulation runs while a morph is timeline animated, dForce takes over and cloth doesn't adapt properly to the new morphology. If Base Genesis and morph are similar it'll be just fine. But if they're too different... then the problem will become obvious :
Such issue as the one described by the OP can be fixed with the Weight Brush Tool, by smoothing a bit the way vertices in the breast area are weighted to adjacent bones (Abdomen Upper, Chest Lower).
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If you're using Blender or ZBrush, this video gives another way (custom morph) to fix such issues. Could help too :
I'm pretty sure this is not a joint weighting issue.
Thank you very much for all your help!
what do you mean "to make a custom morph to match the body morph that will smooth out areas like this"? Is it the same of the video suggested before? Sorry but I'm not a d-force expert!
Yes, you want a morph named to match the one you are using (Millawa Body, you need to get the name by clicking the gear icon on th slider and opening the Parameter Settings dialog since what appears on the slider is just a label) and create a morph with that name (e.g. by exporting just the cloth when it is fitted to an unposed figure with the morph applied and dealing with oddities in a modelling application, the loading onto the clothing and saving as a morph asse) so that Daz Studio will use that instead of trying to make its own.
Thank you so much for your patience and help