Using four OSL scripts and Pixar RenderMan to build up this project.
Bumps and Gloop shaders are for the main shape of pollen grains.
Point light and edge shaders are for the color and fake light on the object.
After rendering from Pixar RenderMan, I did the compositing, depth of field and color correction in Nuke.
SEM - POLLEN GRAIN
SEM - BREAKDOWN