5. Muscle Node

The Muscle node creates the geometry muscle shapes as well as collision meshes for them.

Correct initial settings

Using the name and visibility controls

Visualize

• Out Model - View the model or the collision model for the simulation.

• Group - Used to set selection.

Shaping

• Subdivisions - Add extra detail to the muscle geometries

• Tangential Smooth - Smooth the underlying shape

• Envelope - Enable smoothing

• Step Size - Amount of smoothing

SDF

• Thickness - Thickness of the skin, recommended to be a low value.

• Resample Enable - resample the SDF to be finer detail by smoothing it.

• Scale - Lowering this value creates more detail.

• Size - Raising this value creates more detail.

Be careful about how much RAM you use! You can sometimes double your usage with this.

Expansion

Samples - how many increments we test to solve the muscle. High samples will be more accurate. Alternatively shorten projection distance.

Iterations - How many times we iterate the muscle solve, higher values will have an inflation effect to the muscles, lower will be faster to work with.

Bias - how close the muscles inflate to each other,

Projection Distance - How far we test the muscles, usually should be between 0.1 - 1.0 for Human sized characters. Might need to be bigger/smaller if your character is bigger/smaller.

Threshold - Limits expansion based on angle of the muscle versus the SDF gradient.

Step Size - Amount of smoothing.

Self Intersections

Samples - Number of iterations to check self intersections on muscle geometry

Threshold - Limits expansion based on angle of the muscle versus the SDF gradient incorporated into the self intersection check.