john mariella


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obj-image Masterclass
Muscles Overview | H16 Masterclass

Recent Forum Posts

Muscle System Aug. 20, 2020, 11:35 p.m.

I took a look at your file and included a few minor modifications. Please see the sticky notes inside for more info.

To answer a couple of your other questions…
The purpose behind selecting Primitives after selecting the FrankenMuscle geometry is so that in situations where a model might have multiple muscles as separate pieces, you can extract specific groups from that model to use as individual FrankenMuscles. Since you have discreet geometry objects already, this step might seem redundant.

To constrain specific parts of a muscle, you can use a MusclePin object. This acts very much like a single-point MuscleRig. You can use the viewport shelf tool to place and adjust your pin, parent it to a bone, then include it as one of the rig sources on your FrankenMuscle.

Automating muscle flex activation in 18.0 is pretty open-ended. One way to go about this is to rely on an expression to drive the Flex>Tension parameter on a MuscleRig. The example in the attached file simply uses the bone angle between the two bones in the skeleton as a driver for the tension value.

And finally, regarding the collision penetration, a couple of suggestions might be to increase the resolution of your tissue surface to improve collision detection; perhaps try increasing substeps; and one or two of your muscles are modeled quite thin, you might try adding some thickness to them.


animation editor: change tangent type to one keyframe only March 25, 2019, 5:03 p.m.

this probably isn't exactly what you're asking for, but you can break tangent continuity at the first keyframe, and then use the ease-out segment type.

Houdini Muscle Video Hip Files May 12, 2018, 10:02 p.m.

Hi HouUser, I'm not sure if Scott has posted the Minotaur example anywhere yet. The T-Rex legs demo'ed in the Muscles Masterclass video are available for download here []. But these muscles are setup with only the skin deformer workflow (ie, non-FEM). The FEM version of the Masterclass and associated files will be available closer to the release of Houdini17.