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Description
A method I use for batch correcting certain bone issues by using the "multiply of bone frame position angle" tool on targeted bones for portions of a motion, and using the bone/frame manipulation, Sel-bone & range-sel items to isolate frames.

This method saves me hours of editing things manually and it produces a better, less shaky result that's truer to the original than single frame manual correction, to boot. No more hands going through boobs for me! lol... unless it slips past my notice and I don't see it in time of course lol

It's a little hard to describe/explain, but easy to do, once you get the idea of bones existing on the x,y,z axis. Hope it helps other beginners! ^^ If you have any questions or additions, please say so in the comments!

Thanks to the friends and teachers who have taught me so much so far! I really appreciate you!

Credits:

hzeo Kaito model - edited by
Crybaby motion - by (miyukiohayashi.deviantart.com/… ) (This motion is beautiful btw )

[edit]:

Here is an additional, abbreviated text version of the above picture tutorial, it may be helpful:

1) Load your model in MMD, load the motion on your model. Go to camera view and load the camera.

2) Make sure you are still on camera view. Preview the motion to find glitches like hands passing through boobs. Find where the glitch is the worst. (I find that breaking the motion's preview up into pieces of 100-200 frames at a time helps me figure out where problems are happening quicker than clicking through frame by frame.) Determine in frame numbers where the glitch starts and stops. This is the target area. Write down the frame number (ie hands going through the body) starts and the frame number the problem stops. You'll use these numbers in the next step to fix the problem.

3) This step is complicated to describe but is easy to do once you get it. First, switch from "camera" to model so you can select the model's bones. Figure out what bone needs to be adjusted to fix the problem and click on that bone to select it. The bone should "highlight" in red when selected. (You don't register the bone. Just click it so it's selected.)

In the frame manipulation panel, make sure you're on "Sel Bone" in the dropdown menu so only the bone you have selected will have its angle corrected. Before continuing, click anywhere in the frame manipulation panel that's empty/has no diamonds. (All red "diamonds" should now be turned grey, which means nothing you don't want is selected, once you've done this.)

Then, in the range-sel" boxes, enter the range numbers of what frames in the motion you are targeting to fix (written down in Step 2). Hit the button that says "range-sel" to highlight all diamonds for the bone you have selected within the target range. Do not hit register. Do not do anything. Just continue to step 4.

4) Click "Edit" dropdown menu that is at the top of MMD. Click "multiply of bone frame position-angle(_key)" choice. You will pop up a dialogue window (shown above in the tutorial.) We will be using the lower section- the "angle" section, to modify bone position angle, to fix the motion where it has the problem. (FYI: The "bone place" section will rip the bones out of their sockets; you don't want this for this kind of problem; you want to adjust "angle" instead, like with posing.)

5) Figure out which angle you need to change to fix the problem. (ctrl+z usually undoes the last action if you mess up.)

All points in MMD including bones are done on an x,y,z axis, where x is right-left, y is up-down, and z is close-far away. Which does what depends mostly on the point of origin/motherbone and how it is facing, so you may have to figure out what angle(s) you need to adjust to fix the problem to figure out your orientation.

If you're not sure which axis angle to change, try mimicking the action of the model with your own body- if you move your arm, is it going "away" from you (z axis), to the right or left (x axis) or up and down (y axis)? Sometimes you have to adjust a couple different things, but the less adjusting you have to do, the better. Once you have an idea of what will fix the problem, insert a fraction/number in the correct angle slot and hit "ok" to see what the changes being made are. It's a little complicated until you figure out what you're doing, so play around with it when you're not in a time crunch and you'll see how it works pretty well.

When you are satisfied with the result, do not hit register. It does that for you automatically when you use this method.

6) Final step: If what you did looks like you fixed the problem, then go back to camera view and preview the corrected motion again to make sure it's all set and looks good. If it needs further adjustments, go back to model view and either hit ctrl+z to undo the last bone angle change you applied, or fiddle with it some more until you are happy, then preview it again, until you are completely happy and everything is fixed.

This is a method for if you have multiple frames to correct where it would be incredibly time consuming to do it frame by frame, and when done correctly, quickly gives a homogeneous corrected result that is true to the original motion that needed correcting.

Description
A method I use for batch correcting certain bone issues by using the "multiply of bone frame position angle" tool on targeted bones for portions of a motion, and using the bone/frame manipulation, Sel-bone & range-sel items to isolate frames.

This method saves me hours of editing things manually and it produces a better, less shaky result that's truer to the original than single frame manual correction, to boot. No more hands going through boobs for me! lol... unless it slips past my notice and I don't see it in time of course lol

It's a little hard to describe/explain, but easy to do, once you get the idea of bones existing on the x,y,z axis. Hope it helps other beginners! ^^ If you have any questions or additions, please say so in the comments!

Thanks to the friends and teachers who have taught me so much so far! I really appreciate you!

Credits:

hzeo Kaito model - edited by
Crybaby motion - by (miyukiohayashi.deviantart.com/… ) (This motion is beautiful btw )

[edit]:

Here is an additional, abbreviated text version of the above picture tutorial, it may be helpful:

1) Load your model in MMD, load the motion on your model. Go to camera view and load the camera.

2) Make sure you are still on camera view. Preview the motion to find glitches like hands passing through boobs. Find where the glitch is the worst. (I find that breaking the motion's preview up into pieces of 100-200 frames at a time helps me figure out where problems are happening quicker than clicking through frame by frame.) Determine in frame numbers where the glitch starts and stops. This is the target area. Write down the frame number (ie hands going through the body) starts and the frame number the problem stops. You'll use these numbers in the next step to fix the problem.

3) This step is complicated to describe but is easy to do once you get it. First, switch from "camera" to model so you can select the model's bones. Figure out what bone needs to be adjusted to fix the problem and click on that bone to select it. The bone should "highlight" in red when selected. (You don't register the bone. Just click it so it's selected.)

In the frame manipulation panel, make sure you're on "Sel Bone" in the dropdown menu so only the bone you have selected will have its angle corrected. Before continuing, click anywhere in the frame manipulation panel that's empty/has no diamonds. (All red "diamonds" should now be turned grey, which means nothing you don't want is selected, once you've done this.)

Then, in the range-sel" boxes, enter the range numbers of what frames in the motion you are targeting to fix (written down in Step 2). Hit the button that says "range-sel" to highlight all diamonds for the bone you have selected within the target range. Do not hit register. Do not do anything. Just continue to step 4.

4) Click "Edit" dropdown menu that is at the top of MMD. Click "multiply of bone frame position-angle(_key)" choice. You will pop up a dialogue window (shown above in the tutorial.) We will be using the lower section- the "angle" section, to modify bone position angle, to fix the motion where it has the problem. (FYI: The "bone place" section will rip the bones out of their sockets; you don't want this for this kind of problem; you want to adjust "angle" instead, like with posing.)

5) Figure out which angle you need to change to fix the problem. (ctrl+z usually undoes the last action if you mess up.)

All points in MMD including bones are done on an x,y,z axis, where x is right-left, y is up-down, and z is close-far away. Which does what depends mostly on the point of origin/motherbone and how it is facing, so you may have to figure out what angle(s) you need to adjust to fix the problem to figure out your orientation.

If you're not sure which axis angle to change, try mimicking the action of the model with your own body- if you move your arm, is it going "away" from you (z axis), to the right or left (x axis) or up and down (y axis)? Sometimes you have to adjust a couple different things, but the less adjusting you have to do, the better. Once you have an idea of what will fix the problem, insert a fraction/number in the correct angle slot and hit "ok" to see what the changes being made are. It's a little complicated until you figure out what you're doing, so play around with it when you're not in a time crunch and you'll see how it works pretty well.

When you are satisfied with the result, do not hit register. It does that for you automatically when you use this method.

6) Final step: If what you did looks like you fixed the problem, then go back to camera view and preview the corrected motion again to make sure it's all set and looks good. If it needs further adjustments, go back to model view and either hit ctrl+z to undo the last bone angle change you applied, or fiddle with it some more until you are happy, then preview it again, until you are completely happy and everything is fixed.

This is a method for if you have multiple frames to correct where it would be incredibly time consuming to do it frame by frame, and when done correctly, quickly gives a homogeneous corrected result that is true to the original motion that needed correcting.