Converting "Game base" rig to Rigify results in twisted foot

makehumancommunity / mpfb2

MPFB2 is a free and open source human generator for Blender

http://static.makehumancommunity.org/mpfb.html

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Converting "Game base" rig to Rigify results in twisted foot #30

Closed grascm closed 1 year ago

grascm commented 2 years ago

Steps to reproduce:

Create human from scratch
Add standard "Game engine" rig
Convert to rigify (with produce enabled)

Control foot_tweak_l.001 appears to be rotated by 90 degrees for some reason.

UPD: MPFB version from latest commit on master branch, Blender 3.1

grascm commented 2 years ago

After some research i figured out that, the issue seems to be in rigify itself. This project, however, can have a workaround. There are several options.

The simplest

Apply rest pose as current pose, as a final step of generation. For some reason current and rest pose have difference, and the rest pose doesn't have issues.

More correct solution

I suggest using limbs.leg instead of limbs.paw when generating rigify metadata. It generates different deformation bones, and the issue is not relevant anymore

(the first (closest) leg is limbs.paw, the second is limbs.leg)

Also it has more convenient IK controls, for leg animation.

Rigify requires additional heel bone, for IK control placement, it can be generated dynamically. If this solution is OK for the project, i guess i can implement it and make a PR.

joepal1976 commented 2 years ago

Thank you for the suggestion.

As far as possible, MPFB2 should handle these kind of issues. So I'm putting it on the to do list.

joepal1976 commented 2 years ago

For reference, how it looks before change:

joepal1976 commented 2 years ago

After fix:

michaeltyers commented 2 years ago

Hi,

I'm currently using Blender 3.3 and version 2.0.1 of the MakeHuman Plugin for Blender.

I downloaded and installed this version of Blender and MPFB last night.

Issue still persists.

Applying as rest pose does fix the issue.

joepal1976 commented 2 years ago

The 2.0.1 stamp in the preferences is a misnomer, it's actually 2.0-alpha1. Alpha 1 was released in march, ie four months before the issue was fixed.

Can you try downloading the latest build from https://download.tuxfamily.org/makehuman/plugins/ and see if this fixes the issue for you?

michaeltyers commented 2 years ago

Hey @joepal1976,

Thank's heaps for your assistance. I thought I was downloading the latest version but clearly not - they just had similar names.

Appreciate the assistance.

Mike