Applied Houdini Particles IV - Physical Instances will teach you how to go beyond using particles to just simulate points, and instead treat them as physical things! When dealing with massive amounts of physical objects, it is no longer efficient (or even possible at all oftentimes) to use rigid body systems to get a quick and good looking result. Instead, we will customize the behavior of the particles both in the air and colliding with the ground to look great and simulate fast. Also covered in this lesson is an easy to implement growth/dissolving algorithm, better translucency shading, and more of my favorite workflow tricks. Start making impossibly detailed particle simulations now!