Optimization

Until now, we've been simulating all particles of an actor. But what if we want... say, make cloth out of only a few parts of a mesh? In this case, we can use the optimization tool.

Simply put, optimizing an actor gets rid of all particles that do not contribute at all to the simulation. These particles are fixed particles that are only linked to other fixed particles

• Select all particles in your object.
• Fix them.
• Unfix only the particles you want to be simulated.
• Click "Optimize".

This will reduce the amount of particles and constraints in your cloth object, making sure Obi focuses only on these parts that actually need it. This can make a HUGE difference in performance!. You also can (and should if possible) optimize skinned meshes in the case of cloth, such as characters.

From left to right: before and after optimization.