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Trackdancer — MMD Tutorial on Chibi-sizing Motion Data
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Published: 2012-08-05 09:17:07 +0000 UTC; Views: 38475; Favourites: 673; Downloads: 433
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Description
Simple method on how to scale down motion data for use with chibi-sized models.Important Note:
The figures I used are for demonstration purposes only, they cannot and should not be applied in all circumstances. You will need to make adjustments to match each individual model and motion data set. So for example, when I did my Chibi Music Class video, although all 5 chibis used the same motion, each one required a different set of adjustment ratios (well 4 of them did anyway, Chibi Zatsune Miku and Chibi Miku used the same ratios).
Additional Notes: courtesy of Kas97
1/. Nendoroids will need to use ratios of around 0.4:0.9 - see his her notes in the comments below for specific details
2/. A useful tool (software) for fine tuning motion data to fit a specific MMD model: http: //yumin3123.at.webry.info/200811/article_1.html
Example video links (YouTube):
MMD Chibi Music Class - youtu.be/OYLAGXwKzaI
Related content
Comments: 224
Ah, I think I get it now. Thank you.
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cool but i do it easliy i just make my chibi dance to love and joy and such
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Yeah it's nice to see the chibis perform without them looking like they'll tear apart at the seams.
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So could a similar method to this be used if you're trying to use motion that was made on a female model, but being used on a male model?
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Male models tend to be bigger so, yeah you can scale up the motion slightly if necessary. Same principle applies.
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Same principle applies to large models.
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The method is sound for most motions on most models. However, there may be an odd few motions which do not scale properly when applied to certain models. In these instances, basically, tough, but you're out of luck. The chibi IA model by Mqdl/Kiyo, for example, has non-standard bone axis alignments and with a few motions, will spaz out regardless of whether or not the motion was scaled or not.
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Would you know how to chibi-size camera data?
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Unfortunately, I don' think you can. At least I have not been able to find a method to do that. But that's not unexpected as the camera isn't really a model. You'll just have to manually adjust the camera angles or make your own camera motion.
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how did you pull the frame thing up?
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It's in the menu's up across the top. The picture comes from an earlier version of MMD and things have changed since then.
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i see it know thx
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Thanks I had a really tiny model (Puchimas) so I set it to 0.10 and it works great!
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Thanks for posting this comment. I've wondered how small you could go and have the model still work properly.
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In principle the concept is the same but the way to figure out the correct ratio depends on the proportion of distortion.
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My nendoroid's legs still go crazy. any way i can fix that? (Remember that a Nendoroid's head is the same size as it's body)
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The issue is that motions have a direct correlation to the position of the bones. Since most Vocaloids have a similar bone structure, using motion designed on one model fairly easily transfers to another model with a similar bone structure.
Nendoroids (unlike chibis) do not have a similar bone structure. Wherein, with chibis, translating the data for their use is just a matter of scaling. You cannot really do this with Nendoroids primarily because their bone system is quite different from a correlation standpoint simply due to the distortions.
There are two are ways to fix this. Neither are simple.
1/. Adjust the motion manually; this is the easier solution.
2/. If you understand how the bone system works, change (as in adjust) these in the nendoroid model in the PMD editor to as closely match that of a standard model as possible.
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Thank you so much! ^^
I have an IA chibi and every time she spreads her legs, it looks like she's doing the splits -_-
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Chibi IA: I absolutely, categorically and adamantly refute the claim that I "spread" my legs. That's most unladylike and I'm definitely a lady ... unlike Miku, Gumi and especially Alice!
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Ok, Then I'll stop making you dance Happy Synthesizer with sister IA
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The 2 IA sisters makes a good dance pairing for a lot of motions.
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Just any pair of brothers or sisters make a good dance pair in my opinion
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I need help with two "non-chibi" models. One is a Luka model and the other is a Yukari one, when I load the motion Yukari's legs are squished together while Luka works just fine. What should I do since they are close to being the same size?
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I have a rough idea what might be going on. Is the Yukari model an edit, or is it an original model?
1. If the Yukari model is an edit, contact the person who made the edited version and have them fix their own mess.
2. If the Yukari model is an original, I will need to know which one it is and the name of the motion you're using.
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Im pretty sure it's an original, and Im using the motion "Do re mi fa rondo" Rin's part (here is where i got it from [link]
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I still need to know which Yukari model you're using ... 99% of the time these types of problems lies with the model and not the motion.
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here is where i got it, [link] does this help? I have the latest version
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Right, thanks for the info. The short answer is that there is no easy fix for this.
The Yukari model is fine, it's the tolerance built into the motion which is the issue. In fact, Mamama's Appearance Miku has the same problem with this motion. The motion was prepared on a model whose bone structure at the waist/hip is wider than on the Yukari and Appearance Miku model, which is why you have this problem. Luka tends not to have this problem as her build is more mature.
The fix: You'll have to manually edit the motion.
The alternative is to wait till Yukari and Miku matures a few more years. Once they have the hip structure of females that are of childbearing age, the problem will go away ... probably ...
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ahh okay! thanks for the info XD
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Aww...I need a little help with this one motion...I'll take a screen later and post it.
I don't know where to post it though XD
It's for the motion NEE, her legs are legit WEIRD XD
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All three motions in the NEE set works with my chibis except for one: Chibi IA. That's is because the orientation of the axis of her bones are non-standard and the model will fail with certain motions that move the IK bones in a particular way. There is no fix for this.
Ratio to use with this motion set for petite chibis: 0.55 (worked fine for me).
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Which of these XYZ are which? I have a model who is proportionate, but I want to only resize part of her movement.
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In a nutshell:
x = left/right
y = up/down
z = front/back
In other words, standard 3D graph axis.
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4fps.... I could tell what it looks like XD
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Actually, the fps readings are irrelevant when rendering to video. That's just the playback speed when viewed within MMD.
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That's what I meant, "The Playback Speed".
XD
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SSAO was responsible for that low fps reading in that scene ...
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