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It seems like you could probably just aim a typical camera at a potato and get enough sensor noise in the pixel data to be a perfectly fine RNG. I doubt anyone could hope to demonstrate a bit for bit match of any two pictures using a modern digital camera (maybe even if the lens is closed).

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Pointing the camera at a lavalamp has the same noise, AND movement aswell.

So lava lamps produce higher entropy than a potato everything else being equal.

The point is that there is no possible scenario where CCD noise alone is inadequate, but CCD noise + lava lamps is adequate.

But the difference is vanishingly unlikely to matter.

I know, I just enjoyed having the opportunity to compare lava lamps to potatoes in a somewhat meaningful context.

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