Cineversity

Hi, I’m trying to get a clean left elbow deformation on my C4D biped character rig, R26. So far I’ve managed to create a psd morph, sculpt its correction when bending the joint (elbow) connect it to the desired driver (L_BD_NB_Forearm_Twist_01_jnt) and make it in place and additive. Everything works fine when bending the elbow, until I lower the arm throught the shoulder joint. Then the elbow gets a stange extra deformation. As if the priorities were set in the wrong order. Any advice on how to correct this i would greatly appreciate. made a short clip of the problem on vimeo too.

https://vimeo.com/756379279

Cheers
Philip

Hi Philip,

Thanks for the video, a project file would have told me more. Let’s go with the video.

This leaves me with the question:

Was the Shoulder in Binding Pose during the PSD setup?

If you set the Pose Morph to Strength=zero, is the problem gone with the shoulder?

Are your points weighted, so they are exactly 100% in total, not 99.99% or so, and to the joints that would drive them?

Please have a look here:
https://help.maxon.net/c4d/2023.0/en-us/Default.htm#html/TCAPOSEMORPH-ID_TAGPROPERTIES.html?TocPath=Object Manager|Tags Menu|Various Tags|Pose Morph|_____2

and here

https://help.maxon.net/c4d/2023.0/en-us/Default.htm#html/TCAPOSEMORPH-OBASELIST.html#driver

Example (press play)
https://www.dropbox.com/s/6sff8vbd9va1otq/CV3_2023_drs_22_CApm_01.c4d.zip?dl=0

All the best

Dear Dr Sassi, thank you for your quick reply and the example file. I have read the documentation you refer to but i suspect i do not fully understand it. I’m missing something obvious. I’d be happy to share the file, i have temporarely parked it at my server at http://www.dataflip.nl/drsassi I would very much appreciate it if you could have a look at it and point me in the right direction. There are no complete tuturials or video explanations on the psd menu.

Best
Philip

Hi Philip,

I have sent an PM with an upload link. I’m not familiar with dataflip, and for security reasons, I won’t use it. Sorry!

Thanks for understanding.

Thanks for the file, Philip.

My understanding is – that the joints that drive the points for PSD must be in the Driver list.
With that, the resulting Joint-pose is part of the recorded PSD result.
With two joints producing pose one and then in pose two, that would result in the need for a definition of each pose, as the angle for the Shoulder changes.

I have sent you your file with two PSDs inside the PoseMorph, and I think the problem you have described is gone.

Let me know if that works for you.

All the best

Thank you very much for your help. Setting the shoulder and the forearm joints together as the driver of the elbow PSD correction works. Defining just one PSD morph appears to be enough as long as it has the two joints set as the driver and the interpolation mode set to global strength. I plan on a detailed video tutorial if this all works out and the project is finished.

Best
Philip

Hi Philip,

Thanks for the feedback.

If one PSD works for you, great.

My best wishes