GuruBlog

For this animation I used a volumentric material to simulate dust in the light cone of a spotlight

you can download the blend file here

for this animation I used the cell fracture addon to break a sphere and made the shards block the light paths of a point light inside a volume scatter shader

you can download the blend file here

For this animation I used a voumetric material on the world node

you can download the blend file here

for this animation I used small cubes with an emission shader as particles

you can download the blend file here

for this animation I used the btrace-addon to trace the vertices of a randomly moved and scaled ico-sphere

you can download the blend file here

For this animation I used an ico-sphere as a dynamic paint canvas in displace mode to move some cube particles

you can download the blend file here

for this animation I used the vertices of a icosphere as emission points for a particle system

you can download the blend file here

For this animation I created a particle system and froze time

you can download the blend file here

For this animation I used the gooseberry-branch of blender 2.75. I made a volumetric material using the point-density texture node to create a cloud and added some red point lamps to a second particle sytem from the same emitter.

you can download the blend file here

If you want to run this blend file make sure you use the gooseberry branch of blender 2.75 - the point-density texture node isn't available in the stable branch yet

for this animation I used the molecular-addon by pyroevil on a fluid particle system without gravity

you can download the blend file here