I made a blender IK rig for character that I was modeling. The knee bone bends, but the mesh does not. No matter what type of weight painting I do, the mesh doesn't bend, it just deforms and twists. I also tried rotating the pole target around, but that didn't help.

Here are some screenshots:This is the weight for the lower part of the leg

Here is what happens when I try to bend the knee

  • $\begingroup$ Looking at the mesh in the images, looks like you don't have enough geometry to achieve the bending action, do you have an edge loop where the knee is? $\endgroup$ – Georges May 29 '16 at 16:44

The bones can effect only the vertices position, it looks like your leg has only 4+4 vertices. Try subdividing it (in three different ways):

  1. Add a subsurf modifier (upper in the modifier stack than the armature modifier)

  2. Using the loop ring tool (shortcut Ctrl+R)

  3. Selecting the mesh in edit mode then hitting W> Subdivide

Search the internet for typical mesh geometry for a good deforming leg and copy the topology.

  • $\begingroup$ Thanks for getting back so quickly. I just added loop cuts at where the knee joints were and now I just need to do some weight painting and it should work. Thank You! $\endgroup$ – AidanYtgr May 29 '16 at 16:54
  • $\begingroup$ I've noticed a few of your answers have been edited to include kbd formatting. Kbd formatting helps to indicate a button press and helps it to stand out within sentences. Just something to consider for future answers :) $\endgroup$ – Ray Mairlot May 29 '16 at 20:24
  • $\begingroup$ Thank you Ray, where can I find infos about how to do kbd formatting? $\endgroup$ – josh sanfelici May 31 '16 at 9:47
  • $\begingroup$ @joshsanfelici it's html, kbd stands for keyboard I guess: <kbd>X</kbd> will appear as a keyboard button with the letter X in it $\endgroup$ – Georges Jun 2 '16 at 23:52

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.