This is the "Bubbley HiComplex" comp that uses the Multi SmoothRidge type. Here used with the Seamless Looping functionality to create this ever-looping GIF.
"Oil Flow" - same as above but with specular and almost no diffuse.
Here is the SmoothRidge fractal type lit with a few lights and Material properties setup so there is almost no diffuse and lots of specular. Lux also used here to visualize the lightsources.
Also included is another test with the technique from the Mir Thing tutorial.
If you want to check them out here is the AE project (CS6): mir_beta3_stuff.aep
You'll need Mir v2 beta 3 to render correctly.
There's a couple more comps in there too. Let me know what you think in the comments!