gregjenings

I’m not sure if this is a bug, or if I might be misunderstanding the intended behaviour. When painting a specific region to limit the effect locally, it doesn’t seem to work as expected with Tissue properties (OTIS). In particular, when using Shrinkage — either through *Tissue Core Rest Scale* or *Tissue Rest Scale* — the painted region does not appear to restrict the effect to that area only.

Has anyone else encountered this, or is there a recommended approach for achieving region-specific shrinkage with the Tissue setup?

Hi everyone,

I’m having trouble achieving the expected muscle definition using OTIS in Houdini.

For some reason, I’m not able to get the same level of visible muscle detail that I can achieve with Vellum (please see the attached reference images). In terms of realistic muscle deformation, the results from OTIS appear much flatter and resemble something that could easily be achieved with a simple blendshape, rather than exhibiting natural muscle bulging and volume shifts.

Additionally, I’ve noticed that OTIS does not seem to produce realistic muscle behavior similar to Ziva, where muscles naturally bulge and shift upward during contraction. Instead, the deformation feels limited and lacks dynamic volume change.

I’ve attached my Houdini file (Version 21.0.631) in case anyone would be willing to take a look and help me understand what I might be missing or setting up incorrectly that’s preventing proper muscle definition with OTIS.

Any guidance would be greatly appreciated. Thanks in advance!

https://www.youtube.com/shorts/82gCV_zJCtE [www.youtube.com]

I am looking forward to understanding how I can achieve a result similar to the above shared video in Houdini?