Have a good day everyone
Can somebody help me with the weight painting in section 5?
I try to move the left leg; however, the body mesh’s shape is also moving.
It turns out that some weight painting in the back of the body mesh that I cannot delete by decreasing the weight from 1 to 0.
I have no idea what I did wrong.
Basically, you can paint it blue so it will not have any influence.
But check also other bones too!
And check vertex groups too when in weightpaint mode.
Thank you Pete
I checked the vertex groups and tried to apply the drawing brush again in the weight paint mode.
Problem solved.
Hi Pete, Can you do me a favor?
When I was animating the 1st keyframe, I found out that when I move the spine, the mesh is moving as well.
I checked the weight paint; it seems all blue and has no connection with the spine.
Can you help me with this problem?
I also attach the blender file if you have free time to help.
Maybe you should check the mesh, in case you have an unexpected vertex or a hole or something like that? BTW, are you having any other issues with your file? I was curious about this because I have had my share of weird behaviours, but Blender crashes while trying to open the file.
Yes, this strange effect does sometimes occur when working with automated weights.
And I mean one or two vertices sticky in space, when moving the bones.
I have no clue on how this happens. I have the same experiences … 
But basically, the vertices involved aren’t part of the bone connection and thus weight map.
or… never don this before …
Add the missing vertex to the involved vertex weight paint group… maybe a bit more advance or experimental. But we are in a learning process
I took a look and managed to fix it - maybe not in the most proper way, but it works. Here’s what I did.
To make this easier, turn the Subdivision Surface modifier off in the viewport. This will help you to identify the rogue vertex.
With the armature selected in Pose Mode, move a bone just enough that you can go back to the mesh (Cube1) in Edit Mode and find the bad vertex at the back of the shoulder, here:
Delete this vertex. It’s going to leave a mirrored hole in your mesh, but we’ll fix that in the next steps.
Select these two vertices and press F to create an edge between them, then go to the Viewport menu and click Edge–>Subdivide. It should look like this:
Select the middle vertex and the one at the bottom of the shoulder, and press F to make an edge between these:
Now just select one quad of vertices at a time and press F to make a face between them. Be careful that these faces are only the quads they should be (don’t have any extra or incorrect vertices selected when you press F. You don’t want weird self-intersecting N-gons here). You may also want to grab some vertices around the shoulder and even things out, but that’s up to you; TV Man will work just fine now (I didn’t even have to play with weight-painting). Oh, and turn your Subdivision Surface modifier back on as well - almost forgot about that!
Indeed I’ve actually never seen this before (not that I’ve been using Blender all that long though). It didn’t appear to be a weight-painting issue and Merge By Distance returned nothing, so I’m not sure what could’ve happened. Ah-well, you should be good to go now anyway Tony =)
Thank you guys.
With the support from all of you, now I solved the problem with the vertex.
Ready to go through the animation process.
Truly appreciate the knowledge and dedication to support newbies from the Team.
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