Visible – Turns the metaball object on and off. Use particle size – When enabled, the particle size from the source particle system is used; otherwise, the Particle Radius parameter determines the size of the particles. Threshold – Controls how close the iso surface is to the particles. Lower values move the surface away from the particles, while higher values make the surface cling close to the particles. For more information, see the Threshold example below. Step Length – The main control for quality vs render time of the metaballs surface. Lower values produce a more precise surface, but may take more render time. Higher values reduce the render times, but can produce artifacts. The metaballs object uses a larger step length for GI rays in order to reduce the render times. For more information, see the Step Length example below. Distance Function – Determines the type of function that is used to produce the metaballs field around the particles. Smoothing field bumps – Attempts to smooth out the surface by culling away small stray particles. For more information, see the Smoothing example below. Smooth radius – The radius value when smoothing field bumps is enabled. Smooth expansion – A value that further controls the smoothing. Override motion blur samples – When this checkbox is off, the Geometry Samples value is taken from the global Camera rollout. When this is on, the number of geometry samples is taken from the Motion Blur Samples parameter below. |