You have to have a light in the scene; you have to apply a material to the particles.
Blobby - Called metaballs - is attracted to meld with nearby particles
Radius - size of sphere
Threshold - how attracted it is to the nearby particles;
1 = maximum attraction; 0 = none
May need to increase Radius as you increase Threshold
Clouds - Already has the defaultParticle Shader attached, also a metaball
Better Illumination - increases self shadowing
Radius - size
Surface Shading - 0 = cloudier effect; 1 = more distinct clouds
Threshold - how much they melt together
Tube - can be tapered, must have a volumetric shader like particle cloud on it.
Radius0 - starting radius
Radius1 - end radius
Tail Size - length of tube (is multiplied by velocity) faster = longer tail
Rendering Tip: To render without particles, select particles -> Attribute Editor under Render
Stats: Turn Primary Visibility OFF
Lighting Tip: Cloud, Tube, and Blobby need lights in the scene. Point, Multipoint, Streak, and
Multistreak can also use the lights in a scene - all others do not.