T-Rex Muscle and Tissue

Explore a muscle and tissue setup for T-Rex legs. Start with the KineFX animation rig that is then used to drive all the simulation in the Muscle/Tissue/Skin template. This setup could be easily repurposed to work with your own character and provides a great starting point for understanding how this new toolset works. This file has lots of annotations to help you understand how the different parts work together.

This setup was created by John Mariella and then packaged up by Jeff Wagner

(1 response)



Senior Technology Consultant at SideFX since 1994.

More from Jeff Wagner


  • CYTE 2 years, 3 months ago  | 

    Oh thats great! Thank you!


  • FaitelTech 2 years, 3 months ago  | 

    Every step is very well commented on. Thank you, John, Jeff.

  • Harold1007 2 years, 3 months ago  | 

    This is amazing!
    Looking forward to learning from this demo file.

  • aguito_takahashi 2 years, 3 months ago  | 

    Thank you!
    What I didn't know is going to be clearer.

  • chovasie 2 years, 3 months ago  | 

    Thank you!

    Finally CFX got some love from you guys. Houdini getting more and more user friendly in muscle simulations, but tutorials like this that give us idea what would be best way to approach it, was something that i really needed. This will make transition from Ziva and other FEM solutions a LOT easier! Keep them coming!


  • Harold1007 2 years, 3 months ago  | 

    Hi, I tried to run this file, but somehow the muscle simulation seems to be different than the video that showcased here. I leave all the setting as it was from the file, and it just looks not the same. I am working with 19.0.455. If anyone has any idea please let me know.
    Thanks in advance.

    • Yoshihisa2 2 years, 3 months ago  | 

      Hi, Harold1007
      Do you have strange leg mesh or sagging hips?
      This happens to me too. It seems to be a version issue, but even the latest version still breaks.
      I have already reported this to SideFX.

  • chris3dfx 2 years, 3 months ago  | 

    Thank you !

    if you disable the tissue prop (saggy) then the problem goes away.
    Didn´t dig deeper to find out which value is causing the tissue to get that loose that the stuff is touching ground ...

  • behram_patel 2 years, 2 months ago  | 

    Thanks a ton for uploading this resource Jeff
    I hope you can release the bruiser asset as well.


  • AhmedHindy 2 years, 1 month ago  | 

    I copied the setup to different muscles setup and the muscles are are having a mini localized seizure. Help?

  • melon_pan 2 years ago  | 

    Thank you for sharing the template! Would a commercial version required for successfully running it?

  • old_school 2 years ago  | 

    The file should run fine inside Apprentice. The File Cache SOP supports saving of sequences to cache out the simulations.

  • omid5778 1 year, 11 months ago  | 

    That awesome , thank you Jeff

  • ccyzkk 1 year, 10 months ago  | 

    very very awesome,thank you Jeff!

  • ManiAnim 1 year, 3 months ago  | 

    Muscle geo not visible in your musclesolvervellum sop? They are there in muscle flex sop but then just blue bones in solver.
    It cooks each frame as if they're there but I cant see them.

  • Jorge Ivanovich2 1 year, 2 months ago  | 

    Jesus Christ the number of steps to do this effect.

  • legw 7 months, 3 weeks ago  | 

    is there a video where jeff comments and going over T-Rex Muscle and Tissue hip file?

    • hmihalis1 4 months, 3 weeks ago  | 

      yeah what we really need is a full video series documenting how to model the muscles from scratch for entire human character, going through all the simulation setup in detail for each step, and then how to package the whole thing up into a PDG setup to train the ML deformer for unreal. I would be prepared to donate a kidney for this information.

  • wnschnapp 4 months ago  | 

    Hello, Does anyone have the links for the TREX model/muscles? They dont appear to be with the download file of 11.0 MB. Thanks!

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