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#1 2022-05-25 11:17

Need some help with a motion

Hello, so basically im a clueless newbie and i just downloaded nice motion made by himmelsky https://ecchi.iwara.tv/videos/pqja2urvrcodlvzj but the problem is when i try to made one myself some of the male motion and positions are not synced with the female making the guys do some funny air humping, i checked the readme and it says "All man motions should be adjusted to the female model with "全ての親(All Parents)" bones and "グルーブ(Groove)" bones." I don't really get what that means i tried searching "adjusting female motion mmd" and there's no result for that. Can anyone can help me how to solve this issue thx

2022-05-26 02:53

all MMD .vmd motions work with the absolute position of the bones of each model.
that is, for example, if you make a motion with a model with the knee bones in a position of 5 units in Y, and then you put that motion to a model with the knee bones in a position of 4 units in Y, the motion is not going to behave well.
to share motions between models in a perfect way, the models must have exactly the same structure in their skeletons and their vertices.
To use motions in videos of only dancing there is not much problem since normally the models do not physically interact with each other, since there is no physical interaction with other models, the modifications of the differences in the positions of the bones between the model are not noticeable original and the substitute model.
The opposite happens with the sex motions, if the models do not have the same bone structure of their skeletons exactly as the original models, you will have many problems when using motions that are not related to those models.

one of the ways to deal with that problem is to "head swap" the models.
for example you download the motion and you also download the original models of that motion.
and then you do a "head swap" to the original models.
that way you can use the motion with a "different" model since technically you would be using the body of the original model with the head of the model of your choice.
This method of "head swapping" works very well with sexual motions, as long as they are not kissing motions, fellatio, cunnilingus, and anything that involves head interaction.

Here's a tutorial on head swapping made by me.
https://ecchi.iwara.tv/videos/v8kpou6arginm9565

there are many more tutorials online just google "mmd pmx head swap tutorial" something like that

2022-05-26 09:21

One more problem, the female model he use is custom made and he doesn't distribute it so head swapping isn't possible. Is it possible to just reposition the male model instead ?

2022-05-29 03:13

According to my experience, all models can be "swapped heads".
it just takes a lot of patience and love for such a model.