Parent object to bone latency (lag) issue I'm using Pitchipoy meta rig and have come across instances where I need to parent an object or objects to a bone - I can't be the only one. Every time I do I get a latency issue where the child will lag behind the transform of the parenting bone which gives and undesired deform result.



This occurs when I use my mouse scroll wheel to scrub through the timeline. It also renders like this. It also shows when I scrub the timeline and prior to releasing the mouse button and once I do release the child snaps to the desired location.

What is the proper method for parenting objects to a Pitchipoy rig?

I'm thinking that there may be a hack where I can take advantage of parse order to cause the child to snap to its intended transform, like it does with the mouse button release, that I can do prior to rendering.

v2.76
I searched the bug report and the file you provided there. There is indeed a dependency cycle on object level - it prints out into the system console:



The culprit is that the empty is parented to the head. Blender checks dependency cycles on object level in old dependency graph, which is a known limitation.

To solve the issue switch to the new dependency graph by running blender with --enable-new-depsgraph command line argument. It will work there, because blender evaluates dependencies better and on bone level.