A very nice soap bubble procedural shader. Looks perfect by itself, but amazing with an hdr image mapped into reflected color (not included, takes 1 minute simple to set up) This shader was created in maya 8.5, but uses nothing fancy, just some multiply/divide, contrast, luminance, and reverse nodes. The base of this shader is a series of ramps for color, transperency, and reflectivity.
Has raytraced reflections/refrations.
Created in Maya 8.5, if you need a different version please contact me :)