topic Re: 3DS Max - skin weights changing seemingly at random in 3ds Max Animation and Rigging Forum

3DS Max - skin weights changing seemingly at random

corbin_lm_animator — Sun, 28 Dec 2025 14:05:27 GMT

I don't know how this is messing up. I've tried to work around with almost all the options in my advanced settings and nothing seems to help.

I'm a student and I'm trying my hardest to learn how to do skinning over the holidays just so I can animate a simple character.

I'll show an example of what I'm going through. In the first picture I'm showing the bone that I want the weights on, the weights are set the way I need them to be.

In this second picture I've selected the second bone and I made an extreme change, added a bunch of weight where I don't need it just to show what happens.

And in the final picture I haven't touched the first bone or changed the weights at all, I just selected it to see how it was affected and the weights are completely messed up. They've become extremely minimal.

I'm assuming it's an option that equalizes the weights or changes them based on something else, I don't know. I've tried to look for the option and mess around in the parameters but I can't seem to figure it out.

I don't want the weights on different bones to affect it at all. It's been a real pain for fingers as well and I haven't been able to fix any finger without it breaking or changing the weights on the other fingers of this model.

Re: 3DS Max - skin weights changing seemingly at random

A娘 — Sun, 28 Dec 2025 14:25:23 GMT

the default skin always has a 1.0 total weight for all bones , any time you change a bone , all others will be changed by their rate

if you want to keep a bone when change another , you must use a plugin which supported ，such as bones pro by 3d-io , but when you collapse to skin , it will clamp to 1.0

Re: 3DS Max - skin weights changing seemingly at random

corbin_lm_animator — Sun, 28 Dec 2025 14:49:31 GMT

So the only answer is to spend 400 pounds for a program that I can plug into 3ds max?

There isn't a way to change the weight for the bones in the settings or advanced parameters.

Re: 3DS Max - skin weights changing seemingly at random

A娘 — Mon, 29 Dec 2025 01:30:06 GMT

all bones must effect a vertex at 100% rate , this is no negotiable .

if you must break the rule , you can uncheck normalize at weight properties group , then you can set every bone from 0.0 to 1.0 , and when you set one bone , others won't be changed , but you must bear the consequences as the result may not perform as expected （this is not same as 3rd plugin as bones pro , it will change the model from original state）

回复： 3DS Max - skin weights changing seemingly at random

837102652 — Sat, 03 Jan 2026 06:50:09 GMT

您再设置好区域权重后，进行平滑过渡权重之前，可以点击一次Remove Zero Weights 注意点击之前可以设置值为0.01 再进行点击，这样可以移除顶点上没有权重的骨骼封套，然后选择所有顶点，再weight table 按钮的上面有一排小按钮，上面有一个按钮名为Bake Selected Verts ，选择所有顶点点击这个按钮后可以是封套的的影响失效，现在，你就可以偏正常的使用笔刷工具和权重选点工具来进行蒙皮调整了。如果您会maxscript 的话，再max2019后有一个新的功能，您可以分区域把权重设置为1 然后根据这个前面的操作一遍运行这个maxscript 选择你要调整权重的顶点点击hammer 按钮会得到你想要的结果

rollout HammerSkin "HammerSkin" width:90 height:50

(

button 'b_Hammer' "Hammer" width:72 height:32 toolTip:"多点几下" align:#left

on b_Hammer pressed do

(

skin_ = selection[1].modifiers[skin]

skinOps.bakeSelectedVerts skin_

(

if selection.count == 1 do

(

skinvertarr=#()

undo on

(

skinvertarr=skinOps.getSelectedVertices skin_

skinOps.Hammer skin_ skinvertarr

)

createdialog HammerSkin

最后注意多点几下，hammer函数再权重为1的顶点上点击一下计算的并不对。

回复： 3DS Max - skin weights changing seemingly at random

837102652 — Sat, 03 Jan 2026 06:52:22 GMT

最后祝您愉快的完成您想要的东西