Character armature arm bends in a curve instead of 90 degree angle?

Question

I'm trying to make my characters arm bend properly, but I noticed that it slightly moves downwards then curves at the elbow joint.

Here's the arm at normal view

Then when I bend, the elbow drops below the resting axis and then curves as well. Is this normal?

This is the normal weight paint, but I tried to paint over it yet it didn't fix the arm dropping below the resting axis.

Do I need more loop cuts?

I want something like this where it is perfectly straight and not curving like in my example above

you could easily fix it with removing some edge loops but you probably need to correct the weight, as the lower arm bone seems to influence the upper arm vertices and vice versa — moonboots, Commented Mar 21, 2022 at 11:58

Chris · Accepted Answer · 2022-03-21 11:42:35Z

0

if you are using a "normal" subdivided cylinder

then parent an armature with automatic weight to it

you will get:

and it bends like this:

answered Mar 21, 2022 at 11:42

Chris

1

$\begingroup$ but thats when it's a solo arm, but what if its atttached to a mesh that you created and made the arm by extruding out from the sides? $\endgroup$
– makerbaker
Commented Mar 21, 2022 at 16:29
$\begingroup$ it is exactly the same. As moonboots said - provide your blend file, so we can help you. Everything else is just "guessing". $\endgroup$
– Chris
Commented Mar 21, 2022 at 17:00

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