160,000 cubes drawn and rotating

Fourth step complete - not much done, but this is a proof that 160,000 cubes can be drawn all at once (without lighting), which is more than 5 times a competitor's usage:

As an added bonus, here's 2.25 million cubes drawn and rotating all at once (more than 14 times 160K):

It lags at about a little over one spike of visual updates per second.